XTREME SUBARU POWER
 

XCCELERATION PERFORMANCE ENGINES


Xcceleration can supply high performance engines and engine parts from a short block (no heads) to a full long engine (with heads) ready for installation.

Note: All engines specs are subject to change without notice. All orders will be adjusted automatically to any new pricing.

All Engine Modifications are for Off-Road Use Only. All cams, heads and short blocks are custom built and all are considered racing parts, therefore do not carry any warranty period. In no event shall Xcceleration.com be liable for any warranty, labor or service charges whatsoever, as outlined in our Terms and Conditions section.


Please be patient, certain parts are made per order and require time to manufacturer. All parts will be immediately shipped as they become available. All prices do not include any core charges, shipping, taxes or installation charges. All orders are considered 'Special Order' and are paid in full at time of order via wire transfer.


 

 

EJ20, EJ25, EJ25B Dual AVCS

Street/Race Cams:

New Cams, Not Regrinds

 

 

 

EJ20, EJ25, EJ25B Dual AVCS Street/Race Cams

with Spring and Titanium Retainers

Race and radical Street/Strip. Rough idle.

Requires compatible ECU upgrade.

Specs:
RPM Range: 1500 to 8500+
Advertised Duration (Seat): Int: 280 / Exh: 280
Duration @ .50": Int: 234 / Exh: 234
Gross Lift: Int: .425" / Exh: .425" (10.80mm)


*$1,500. per set, includes springs/retainers


*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 4-6 weeks to deliver. All shipping is the responsibility of the customer.


 

Valve Spring / Retainer upgrade kit:

 

Valve Spring / Titanium Retainer kit

for EJ20 or EJ25.

Valve train kit features strengthened steel valve springs and titanium retainers, designed for use in the cam applications with increased lift and higher revs. OEM valve springs just aren't strong enough to handle cams with increased lift, this kit requires zero machine work for installation and is an affordable solution to similar setups. Kit includes 16 springs & 16 titanium retainers.

Specs:
Seat: 1.420" @ 60 lbs
Nose: 1.000" @ 161 lbs
Coil bind: 0.860"

 


*$400. per set


*Please be patient, takes about 4 weeks to deliver.

ACL Rod Bearings

ACL Rod Bearings

When doing rods and pistons, it's a good idea to replace the rod bearings as well. Proper support via main bearings is crucial to prevent oscillations and wear that can damage the crankshaft and other components if the motor should move out of balance. ACL's high quality rod bearings will prevent fatigue, failure, and reduce drivetrain stress through their durable and strong design.

Know What You Are Buying:

Subaru rod bearings are specific to either a 48mm or 52mm journal size. Journal size is not VIN or year specific, it must be measured prior to purchase. Please be sure which bearings you need as engine internals components are not eligible for exchange or return.

 


*$70. each


*Please be patient, takes about 4 weeks to deliver.

 

ACL Main Bearings

ACL Main Bearings

ALC's main bearings are made of a softer metal so that you don't wear out your crank or engine block. Additionally, a thin layer of oil lubricates the connection between the bearings and the crank allowing the crank to "float" and reduce wear. Proper support via main bearings is crucial to prevent oscillations and wear that can damage the crankshaft and other components as the motor moves further out of balance.

Bearings with extra oil clearance will absorb the stress of higher horsepower motors greater, but will see increased wear during start up. We recommend these be purchased by experienced professionals only.

Know What You Are Buying:

Subaru main bearings are specific to either a #5 or #3 journal bearing position. Journal bearing position is not VIN or year specific, it must be known prior to purchase. Please be sure which bearings you need as engine internals components are not eligible for exchange or return.


*$105. each


*Please be patient, takes about 4 weeks to deliver.

Big Valve STi

DOHC Cylinder Head Packages

Using Your Heads

 

Xcceleration Engineered

Big Valve / Super Hot Cam STi

DOHC Cylinder Head Package

Designed for Intense

LOW and MID RANGE TORQUE!

Intake: 22% Increased Flow (max)

Exhaust: 41% Increased Flow (max)

These Heads are Used in Our 800hp Engines


*$9,000. (requires your heads as core)


 

*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 8-10 weeks to deliver. All shipping is the responsibility of the customer. All head work requires the customer's heads be used as cores and modified or if new heads are requested, $1500 will be added to above pricing.


 

Big Valve WRX

DOHC Cylinder Head Packages

Using Your Heads

 

Xcceleration Engineered

Big Valve / Super Hot Cam WRX

DOHC Cylinder Head Package


Designed for Intense

LOW and MID RANGE TORQUE!


Intake: 22% Increased Flow (max)

Exhaust: 41% Increased Flow (max)

These Heads are Used in Our 800hp Engines


*$9,000. (requires your heads as core)


 

*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 8-10 weeks to deliver. All shipping is the responsibility of the customer. All head work requires the customer's heads be used as cores and modified or if new heads are requested, $1500 will be added to above pricing.


 

EJ25 Stainless Steel Intake Valves

And Exhaust Valves

 

Big Valve EJ25 Stainless Steel Intake Valves

And Exhaust Valves

Intake: 22% Increased Flow (max)

Exhaust: 41% Increased Flow (max)


Performance Stainless Steel Valves engineered for High RPM and High HP. Includes 4 intake and 4 exhaust stainless steel valves, with Magnesium and Bronze Guides. Each 1mm oversized.

 


*$1,500. per set


 

*Please be patient, takes about 4 - 6 weeks to deliver.


 

Custom Forged

Stock Bore and .5mm Oversize

Pistons

for 02+ WRX / 04-06+ STi /

05+ LGT EJ257

 

Custom Forged Pistons

Features include superb ring seal, higher vacuum, lower blow-by, greater durability and increased horsepower and torque through the powerband. Better yet, peak horsepower is retained through the life of the piston rings. This is achieved by lightweight forgings and exclusive machining techniques and processes.

Piston Kit Features:

- High strength aluminum forgings.

- Super lightweight designs.

- Fully CNC machined and balanced to +/- 1 gram.

- Wrist Pins included at no extra cost.

- Accumulator groove included.

- Double pin oilers, force fed from oil ring.

- Pick lock grooves for easy lock removal.

Notes:
- Pistons do not include pin retaining locks; they require OEM pin locks.
- Pistons are sold in sets of four (4) and include piston rings
- Pistons are different between the EJ20 2.0L & EJ255 & EJ257 2.5L engines


EJ20 (92.5mm) or EJ25 (99.5mm) or EJ25 (100mm)


*$1300. Set of 4

Additional Options:

Piston Coating - Top (All 4) $300.

Piston Coating - Skirt (All 4) $300.


*Please be patient, takes about 2 - 4 weeks to deliver.


 

Custom Billet Steel Rods

 

 

 

Custom Billet Steel Rods

Pro-A Beam Rods: The A-beam rod is a light weight rod that is designed for high revving motors. It can hold moderate horsepower numbers and is the rod of choice for most street cars looking to push more power than the stock internals can handle, they are rated for up to 650whp.

Pro-Super A Beam Rods: Pro-Super A beam (Pro-SA) rods are lighter than the traditional H-beam style rod, yet still unbelievably strong. Pro-Super A beam rods bridge the gap between Pro-H and standard Pro-A rods, designed for use in mid to high horsepower and high boost turbocharged and supercharged applications. Pro-Super A beam rods allow for more horsepower and higher RPMs with the advantage of a reduced windage design. Pro-Super A beam rods for the WRX/STI ship with standard 3/8th inch WMC cap bolts and are rated to 800whp, they are great for cars that see both street and race driving.

Pro-H Beam Rods: The H-beam rod has become the industry standard design for high-performance applications. Considering the best overall performance of the part, combined with the least amount of weight, the H-beam is Carrillo's strongest, most durable design available. H-beam rods are recommended for race applications where no compromise in performance is possible.

Pro-H rods for the WRX/STI are available with 3/8th inch cap screw bolts in either standard WMC or Carrillo specific design.  Carr bolts if installed by the stretch method can be retorqued as many times as you want and will not need to be replaced. These rods are for 1000+whp race machines.


Pro-A 3/4 WMC *$1,150. for I Beam, set of 4

Pro-SA 3/4 WMC *$1,250. for I Beam, set of 4

Pro-H 3/4 WMC *$1,350. for H Beam, set of 4

Pro-H 3/4 CARR *$1,500. for H Beam, set of 4


*Please be patient, takes about 2 - 4 weeks to deliver.


SUBARU EJ25 2.71L Stroker Kit

SUBARU EJ20 2.29L Stroker Kit

SUBARU Stroker Kits

BC 4340 billet steel crankshaft (83mm stroke). Not a reworked OEM EJ25 crank.

BC 4340 Econo or Pro Series steel billet rods w/ARP 220,000 psi fasteners.

CP aluminum forged pistons (any bore size, any compression ratio).

9310 nickel carbon steel alloy wrist pins.

Ductile iron plasma top rings, tapered second ring, low tension oil rings.

Typically includes aluminum buttons/rail supports (not locks).

Fully system balanced and ready to install.

NOTE: The stroker kit for the Subaru EJ25 engine utilizes a custom, 83mm monster stroke, steel billet crankshaft, not a reworked factory EJ25 crank. Depending on bore size that you decide, the kit will take you up to a 2.71L with a safe 102mm bore. As usual, each kit features custom CP forged aluminum pistons, premium alloy wrist pins, full ring pack and buttons. Big time power and torque gains. Econo rods rated to 600 horsepower, Pro Series rods rated to 800+ horsepower.

NOTE: The stroker kit for the Subaru EJ20 engine incorporates a proven 79mm stroke, steel billet crankshaft, not a factory STi or EJ25 crank. Depending on bore size that you decide, the kit will take you up to a 2.29L with a safe 96mm bore. As usual, each kit features custom CP forged aluminum pistons, premium alloy wrist pins, full ring pack and buttons. Big time power and torque gains. Econo rods rated to 600 horsepower, Pro Series rods rated to 800+ horsepower.

Stock Specifications:
EJ25 99.5mm Bore x 79mm Stroke - 7.913" Block Height

Stock Specifications:
EJ20 92mm Bore x 75mm Stroke - 7.913" Block Height

Stroker Kit (Econo Rods) Subaru STI EJ257 *$ 3,300.

Stroker Kit (Econo Rods) Subaru WRX EJ205 *$ 3,300.

Stroker Kit (Pro Series Rods) Subaru STI EJ257 *$ 3,600.

Stroker Kit (Pro Series Rods) Subaru WRX EJ205 *$ 3,600.

*Please be patient, takes about 2 - 4 weeks to deliver.


Custom Head Gaskets

EJ20 and EJ25 DOHC


EJ20 and EJ25 DOHC

Custom Head Gaskets


The MLS (Multi Layer Steel) gasket is comprised of three layers of stainless steel. Our gaskets use stainless steel for increased strength, its ability to rebound and corrosion resistance. The outer layers of the gasket are embossed and coated on both sides with a flouroelastomer rubber based material (Viton) designed to meet the demands of a variety of harsh sealing environments, load conditions and surface finishes. The Viton coating is heat resistant to 250C or 482F. And the gaskets are applied dry with no additional coating needed!

The center or shim layer of the gasket is comprised of an uncoated stainless steel layer, which can be varied to accommodate multiple thickness requirements. The MLS gasket is ideal for both aluminum heads to cast iron blocks and aluminum heads to aluminum blocks.

The composition of MLS will also withstand the shearing forces created by aluminum heads on cast iron blocks. No re-torque is necessary. By design the MLS gasket promotes an even torque load across the sealing surface allowing for measurable reduced bore distortion

These are the gaskets we use in the 800hp engines.

*$550. set of 2 - Custom Head Gaskets


*Please be patient, takes about 2 - 3 weeks to deliver.


 
 
 
T-Sleeves

 

T-Sleeves for EJ20 (92.5mm) and EJ25 (99.5mm)

Need boost?

How about a block that can handle 50+ psi?

The T-Sleeve's unique three dimensional support design eliminates sleeve movement under extreme dynamic load. Using the T-Sleeves in your engine reduces the chance of side loading commonly experienced with non-supported conventional sleeves. Sleeve movement under extreme load conditions is the leading cause of head gasket failures.


*$1000. set of 4

Note: need piston size, engine model and type of block

Notice: Because of possible manufacturing casting defects in engine blocks, there is a risk of cracking the block when sleeving, rendering the block unusable. Therefore, you acknowledge that, you the customer assume all liability and risk if this should occur.


The advantages of using T-Sleeves are such:

-Material: T-Sleeves utilizes centrifugal spun nodular ductile iron. The same material consistency that is used in NHRA funny car and top fuel drag racing engines.

-Superior design: T-Sleeves integrates the deck support into the sleeve offering unsurpassed gasket sealing surface area.

-Save cracked factory sleeves: With the T-Sleeves one can recon most previously destroyed blocks

-Superior strength: T-Sleeves have been pressure tested exceeding 220,000 psi without damaging the sleeves.

*Please be patient, takes about 4 weeks to deliver.


 

ARP 12-Point Cylinder Head Studs

 

 

 

ARP 12-Point Cylinder Head Studs

ARP uses a premium grade 8740 alloy that is rated far superior to "aircraft" quality. Each stud is placed vertically in special racks and precisely heat-treated to 190,000 psi, ensuring complete heat penetration. Following heat-treat, each stud is center less ground to make it as close to perfectly concentric as possible. This procedure involves about ten very slight cuts and results in an exceptionally straight part.

ARP studs are manufactured to such exacting tolerances, you will note that gaskets and cylinder heads literally glide into position and are perfectly aligned. ARP studs are thread rolled after heat-treat, which gives them about 1000% (that's ten times) better fatigue strength than those studs that are threaded prior to heat-treat (a very common industry practice). It costs a lot more to do it this way, because it's tough on tooling, but the results are well worth the extra effort. Premium quality parallel ground washers are also included with each kit. ARP head studs are a must for performance engines seeing increased boost, and they are truly the best on the market for your WRX or STI.

FITMENT:
Subaru STI 2004-2007
Subaru WRX 2002-2007


*$350. for complete Head Stud Kit


*Please be patient, takes about 4 weeks to deliver.


ARP Main Bolts / Block Bolts

ARP Main Bolts / Block Bolts

ARP Subaru EJ20, EJ25, & EJ257 Main Bolts are crafted from 8740 forged chrome moly and feature generous under-head radius and rolled threads for excellent reliability. The threads are rolled after heat-treating, giving them 1000% longer fatigue life than ordinary bolts. Parallel-ground hardened washers are included. These are crankcase through bolts for all EJ series motors.

FITMENT:
Subaru STI 2004-2007
Subaru WRX 2002-2007


*$675. per set


*Please be patient, takes about 4 weeks to deliver.


 

EJ257 / EJ205

ADJUSTABLE CAM GEARS

 

 

EJ257 / EJ205 ADJUSTABLE CAM GEARS

Adjustable cam gears deliver the easiest way to dial in more horsepower and/or torque without getting underneath the valve cover, disassembling the engine or dealing with onboard electronics.

These gears are CNC machined from aerospace grade, 6061-T6 billet aluminum for ultimate tensile strength. Easy to read, laser etched face features micrometer style markings for precise adjustment (up to 10 degrees in each direction) and quick tunability.

Each hub is held down by six ARP made, Grade-8 hex bolts for maximum clamping ability. Hard anodized finish prevents premature surface wear.

Shipping cost is $199 per sprocket set.


*$700. for cam set of 4


*Please be patient, takes about 6-10 weeks to deliver.


 

JUN Cam Sprocket Set

Left & Right,

Intake & Exhaust

Subaru STI JDM V-VI EJ207 GC8

 

 

JUN Cam Sprocket Set

JUN Cam Sprockets Left & Right, Intake & Exhaust Subaru STI JDM V-VI EJ207 GC8

JUN Cam Sprocket is the part for adjusting at the best timing after changing cams or tuning. It is also used for coordinating a gap of the valve timing which produced by the machining of the surface for engine over-hole. JUN Intake Cam Sprocket has a mark each 4 degree of crank angle. You Can therefore adjust the valve timing easily in your car.

Cam Sprockets Sold as a set.

This product ships EMS directly from JUN Machine Shop in Japan. Shipping cost is $199 per sprocket set.


*$1100. for cam sprocket set (L&R - Intake & Exhaust)


*Please be patient, takes about 6-10 weeks to deliver.


 

EJ25 Closed Deck Block Conversion

closed deck


EZ30 Closed Deck Block Conversion

EZ30 Closed Deck

 

2.5L Closed Deck Block Case Conversion

Strongest Block


Through our custom process we are able to create a closed deck block for high boost and horsepower applications. The Strongest available.


*$3,200.

Converted EJ25 Closed Deck block case

*Please be patient, each conversion takes about 2-4 weeks. Shipping extra.




3.0L Closed Deck Block Case Conversion

Strongest Block


*$3,800.

Converted EZ30 Closed Deck block case

*Please be patient, each conversion takes about 2-4 weeks. Shipping extra.




EJ25 WRX STi Nitrited Crankshaft

2008 - 10 STI


Nitrided Crankshaft

2008 - 10 STI

Looking to build your own super motor for big power?

Use an STi Nitrided Crankshaft to start with, then add pistons, rods, and Close Deck to your motor.


*$600.


*Please be patient, each engine takes about 2 weeks to deliver.

 

79mm Stroke Billet Crankshaft Subaru WRX STI 2.5L EJ25

 

79mm Stroke Billet Crankshaft Subaru WRX STI 2.5L EJ25

Increased engine performance often means increased engine speed and load. Original factory crankshafts may not be able to withstand the added stress resulting in catastrophic failure. Billet crankshafts are machined from ultra strong EN40B steel and are engineered to endure the harshest conditions and have been tested to withstand over 1000HP! Features include superior lubrication, profiled counterweights and added strength.


*$4,200.


 

*Please be patient, each engine takes about 2 weeks to deliver.

EJ25 - 2.5L STi Engine Block

 

EJ25 - 2.5L STi Engine Block

Looking to build your own super motor for big power? Use an STi block to start with, then add pistons, rods, crank and T-sleeves.


*$1,500.


 

*Please be patient, each engine takes about 2 weeks to deliver.

OEM EJ25 - 2.5L STi Short block

OEM EJ25 - 2.5L STi Short block

Looking to build your motor for insane amounts of power? Use an STi short block to help bulletproof your high-horsepower goal! Comes with pistons, rods and crankshaft.


*$3,300.


 

*Engine gasket kit not included, additional cost.

Please be patient, each engine takes about 3 weeks to deliver.


EJ20 or EJ25 Performance Engine:

Semi-Closed Deck Short Block

Stage1

Xcceleration

Semi-Closed Deck Short Block Stage1

includes:

1. Your Block - Disassembly and Cleaning (no core charge)
2. Cylinder preparation
3. Milling (decking)
4.
Forged Pistons and piston rings
5. Light Weight, hollow piston Pins and Clips
6. Performance Head Gaskets
7.
Parabolic I-Beam 4340 Billet con rod set
8. HD Crankshaft Bearings, coated
9. HD Connecting Rod Bearings

10. Treat Your OEM Crankshaft
11. Dry assembly with plastic gauge
12. Bearing tolerance measurement post-check
13. Deck height measurement to confirm exact quench clearance
14. Cylinder bore measurement
15. Oil galley clean and pre-lube
16. Assembly


EJ25 Engine - *$9,000. (requires your block and crank as core)


*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 8-10 weeks to deliver. All shipping is the responsibility of the customer.


EJ25 Performance Engine:

Semi-Closed Deck (STi) Short block

Stage2

Xcceleration

Semi-Closed Deck (STi) Short block Stage2

includes:

1. New Block - Disassembly and Cleaning (no core charge)
2. EJ25 Short Block
3. Cylinder preparation
4. Milling (decking)
5.
Forged Pistons
6. Light Weight, hollow piston Pins and Clips
7. Piston Rings
8. Parabolic I-Beam 4340 Billet con rod set w/ARP bolts
9. ARP Head Stud Kit
10.
Performance Head Gaskets
11. Heavy Duty Crankshaft Bearings
12. Heavy Duty Connecting Rod Bearings

13. Crank checked and trued
14. Crank Grind to achieve ideal tolerances, all pre-measured
15. Rotating assembly balancing (Crank/Rod/Pistons)
16.
New STi Treated Crankshaft
17. Dry assembly with plastic gauge
18. Bearing tolerance measurement post-check
19. Deck height measurement to confirm exact quench clearance
20. Cylinder bore measurement
21. Oil galley clean and pre-lube
22. Assembly


EJ25 Engine - *$11,000.


*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 8-10 weeks to deliver. All shipping is the responsibility of the customer.


 

EJ25 Performance Engine:

Closed Deck

Short Block

"Strongest Block"

 

Xcceleration

Closed Deck Short Block

includes:

1. New Custom Conversion Closed Deck Block
2. New STi Billet Crankshaft
3.
Forged Pistons
4. HD Piston Rings

5. Light Weight, hollow piston Pins (with Clips)
6. Parabolic I-Beam 4340 Billet con rod set w/ARP bolts
7. Heavy Duty Crankshaft Bearings
8. Heavy Duty Connecting Rod Bearings
9. Block Boring/Milling for sleeve installation
10. Cylinder Boring
11. Cylinder bore measurement
12. Milling (decking)
13. Crank Grind to achieve ideal tolerances
14. Rotating assembly balancing (Crank/Rod/Pistons)
15. Rod bolt stretch measurement
16. Dry assembly with plastic gauge for bearing tolerance measurement post-check
17. Deck height measurement to confirm exact quench clearance
18. Oil galley modification for improved lubrication (pre-lubed)
19. Assembly
20. ARP Head Stud Kit
21.
Custom Extra High Pressure Head Gaskets


EJ25 Engine - *$20,000.


*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 8-10 weeks to deliver. All shipping is the responsibility of the customer.


 

EJ25 DOHC High Horsepower Engine:

Big Valve / Hot Cam Long block

 

Xcceleration

Custom Long block includes:

1. Your Block - Disassembly and Cleaning
2.
Forged Pistons
3. Light Weight, hollow piston Pins and Clips
4. HD Piston Rings
5. Parabolic I-Beam 4340 Billet con rod set w/ARP bolts
6. Heavy Duty Crankshaft Bearings
7. Heavy Duty Connecting Rod Bearings

8. Milling (decking)
9. Crank checked and trued
10. Crank Grind to achieve ideal tolerances
11. Rotating assembly balancing (Crank/Rod/Pistons)
12. Rod bolt stretch measurement
13. Dry assembly with plastic gauge for bearing tolerance measurement post-check
14. Deck height measurement to confirm exact quench clearance
15. Cylinder bore measurement (Straightness and out-of-round checked)
16. Oil galley clean and pre-lube
17. Assembly
18. ARP Head Stud Kit
19.
High Pressure Head Gaskets
20.
Your Crankshaft Treated

Xcceleration Big Valve / Hot Cam Cylinder Head Package

1. Your Heads - Disassembly and Cleaning (no core charge)
2. Port refinishing and bowl contouring
3. Custom angle Valve Seat Machining
4. Hand Blending of the Port/Valve Seat Juncture
5. Combustion Chamber Cleaning
6. Valve resurfacing using the 'center-less' method which also measures the stem and head run-outs
7. Exhaust port balancing,
8. Milling of the cylinder head
9.
Stage4 Camshafts
10. Heavy Duty Valve Springs
11. Titanium Retainers
12. New Subaru Valve Seals
13. New Subaru Cam Seals
14. Setting of the Valve Lash
15. Graduated intake port finishing
16. Exhaust Port polishing
17. Combustion Chamber modifications, measurement and matching of combustion chamber volumes, polishing, and valve un-shrouding
18. Assembly of the Cylinder Head


Big Valve / Hot Cam Long block


*$20,000. (requires your heads and block as cores)

*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 8-10 weeks to deliver. All shipping is the responsibility of the customer.


 

EJ25 DOHC High Horsepower Engine:

Big Valve /Hot Cam Semi-Closed Deck

(STi) Long block

 

Xcceleration

Custom Semi-Closed Deck (STi) Long block includes:

1. New Semi-Closed Deck Block
2.
Forged Pistons
3. Light Weight, hollow piston Pins and Clips
4. HD Piston Rings
5. Parabolic I-Beam 4340 Billet con rod set w/ARP bolts
6. Heavy Duty Crankshaft Bearings
7. Heavy Duty Connecting Rod Bearings

8. Milling (decking)
9. Crank checked and trued
10. Crank Grind to achieve ideal tolerances
11. Rotating assembly balancing (Crank/Rod/Pistons)
12. Rod bolt stretch measurement
13. Dry assembly with plastic gauge for bearing tolerance measurement post-check
14. Deck height measurement to confirm exact quench clearance
15. Cylinder bore measurement (Straightness and out-of-round checked)
16. Oil galley clean and pre-lube
17. Assembly
18. ARP Head Stud Kit
19.
High Pressure Head Gaskets
20.
New STi Treated Crankshaft

Xcceleration Big Valve / Hot Cam Cylinder Head Package

1. New Heads - Disassembly and cleaning
2. Port refinishing and bowl contouring
3. Custom angle Valve Seat Machining
4. Hand Blending of the Port/Valve Seat Juncture
5. Combustion Chamber Cleaning
6. Valve resurfacing using the 'center-less' method which also measures the stem and head run-outs
7. Exhaust port balancing,
8. Milling of the cylinder head (depth is appropriate for application and combustion chamber work)
9.
Stage4 Camshafts
10. Heavy Duty Valve Springs
11. Titanium Retainers
12. New Subaru Valve Seals
13. New Subaru Cam Seals
14. Assembly of the Cylinder Head
15. Setting of the Valve Lash
16. Graduated intake port finishing
17. Exhaust Port polishing
18. Combustion Chamber modifications, measurement and matching of combustion chamber volumes, polishing, and valve un-shrouding


Big Valve / Hot Cam Semi-Closed Deck

(STi) Long block


*$25,000.

*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 8-10 weeks to deliver. All shipping is the responsibility of the customer.


EJ25 DOHC High Output Engine:

Custom Big Valve / Hot Cam

"Closed Deck"

Turbo Long Block

For those wanting

MAXIMUM TORQUE

MAXIMUM STRENGTH


THIS IS THE LONG BLOCK

WE USE IN OUR 800HP

ENGINES

 

 

Xcceleration

Custom Big Valve / Hot Cam / Closed Deck

Short Block includes:

1. New Custom Conversion Closed Deck Block
2. New STi Billet Crankshaft
3.
Forged Pistons
4. HD Piston Rings

5. Light Weight, hollow piston Pins (with Clips)
6. Parabolic I-Beam 4340 Billet con rod set w/ARP bolts
7. Heavy Duty Crankshaft Bearings
8. Heavy Duty Connecting Rod Bearings
9. Block Boring/Milling for sleeve installation
10. Cylinder Boring
11. Cylinder bore measurement
12. Milling (decking)
13. Crank Grind to achieve ideal tolerances
14. Rotating assembly balancing (Crank/Rod/Pistons)
15. Rod bolt stretch measurement
16. Dry assembly with plastic gauge for bearing tolerance measurement post-check
17. Deck height measurement to confirm exact quench clearance
18. Oil galley modification for improved lubrication (pre-lubed)
19. Assembly
20. ARP Head Stud Kit
21.
Custom Extra High Pressure Head Gaskets


Xcceleration Big Valve / Hot Cam DOHC Cylinder Head Package

1. New Heads - Disassembly and cleaning
2. Custom Port refinishing and bowl contouring
3. Custom Intake port redesign and graduated intake port finishing
4. Custom angle Valve Seat Machining
5. Hand Blending of the Port/Valve Seat Juncture
6. Combustion Chamber modifications, measurement and matching of combustion chamber volumes, polishing, and valve un-shrouding
7. Valve resurfacing using the 'center-less' method which also measures the stem and head run-outs
8. Extensive exhaust port modifications, including port balancing and polishing
9. Milling of the cylinder head (depth is appropriate for application and combustion chamber work)
10.
Stage4 Camshafts
11. Heavy Duty Valve Springs
12. Titanium Retainers
13. New Subaru Valve Seals
14. New Subaru Cam Seals
15. Assembly of the Cylinder Head
16. Setting of the Valve Lash


Big Valve / Hot Cam Turbo Long Block


*$33,000.

*Price does not include processing fees, shipping, and duty. Please be patient, each engine is made per order and takes about 8-10 weeks to deliver. All shipping is the responsibility of the customer.



COSWORTH PERFORMANCE ENGINES

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*Delivery Schedules

All above prices do not include shipping or duty, which will be billed directly to the customer. Call for details. All orders are considered 'Special Order' and are paid in full at time of order via wire transfer.


All engine modification components have been designed and are intended for off-highway application. These components are for racing vehicles only, which may never be used on public roads and highways. Federal and many state laws prohibit the removal, modification, or rendering inoperable of any device or element of design affecting vehicle emission or safety in a vehicle used on public highways. Violation of such laws may subject the owner or user to a fine or penalty. Installation of this part may void the warranty coverage, if any, on your vehicle. Vehicles modified by the use of performance parts may no longer be lawfully used on public highways. User assumes all cost and risks associated with these items.

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