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Ultimate 2.5L NA Power Upgrades

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Turbocharger, Supercharger,
 
Custom Performance Heads and Cams

Our goal is to provide 'Real World' Performance Upgrades for your 2.5RS/TS, which will allow you to increase performance up to and over a WRX, using your normally aspirated engine as a base.

Some upgrades require you use premium pump gas (93 Octane) and a Piggyback ECU or some form of Engine Management.

Also, the power upgrades in this section can be used on your Impreza, Legacy, Legacy Outback, Forester and Baja non-turbo engines. Some power kits are model specific and require fabrication for proper fitment. Each Turbo or Supercharger kit requires you run premium fuel and upgrade your fuel injectors for safe fuel delivery.

Please contact us to confirm your application.


Please note, all power outputs stated are only approximations, for reference purposes only and will vary depending on each vehicle, its condition, tuning, fuel and modifications. All Modifications are for Off-Road Use Only. All cams, are rewelds, 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. Turbo, Supercharger kits and hot cam upgrades will require you to run premium fuel and upgrade your fuel system. For safest fuel delivery, you must upgrade your injectors. Fabrication and additional modifications are required, depending on Subaru model.

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. All pricing must be verified the day of quote, at time of order, at time of shipping and will be adjusted based on the value of the Dollar Internationally. Any deficiency is immediately due upon billing and before delivery.

Please note, all power outputs stated are only approximations, for reference purposes and will vary depending on climate, each vehicle; its condition, tuning, fuel and modifications.




PERFORMANCE-RACE CAMS: SOHC MILD or HOT

For Non-Turbo and Turbo Applications

Power of Turbo Charging, with the Reliability of a Non-Turbo!

Please note, all power outputs stated are only approximations, for reference purposes and

will vary depending on climate, each vehicle; its condition, tuning, fuel and modifications.

Our Mild Performance Cams are 'Hardwelded' cams (race quality), designed specifically for street performance cars, which are naturally aspirated. We have designed the cams for 'real world' application, using the factory ECU and OEM intake and exhaust. The camshafts are designed to provide a great idle and increase the overall performance of the engine.

Power over the entire r.p.m. range is greatly improved. You can see gains in HP of about +20HP at redline (6500RPM), on a stock engine. Even more is possible when performance intake, exhaust system and engine management are added.

Our 'Hottest' Performance-Race Cams are designed for naturally aspirated and turbo charged applications. The cams are new 'Hardwelded' cams (race quality). They provide intense mid and high range torque, with a good idle and awesome performance. Engine Management, FPR and increased injector size are required.

  • Power will begin at about 3500rpms and continue to redline (6500 RPM).
  • You can see gains in HP of about 30HP on a stock engine with engine management.
  • When used with a performance intake, header, performance cat, and cat back system, you will see gains in HP of about 50HP!
  • If you add our performance cylinder heads, you will see gains in HP of about 80HP!!

See more HP in our turbocharged or Supercharged applications below.

All cams are for 2.5L SOHC engines, '99 +

Mild Performance Cams *$1699. per set / SOHC Only,

includes springs/retainers, no cores required

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'Hottest' Performance-Race Cams *$2299. per set / SOHC Only,

includes springs/retainers, no cores required

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*Please be patient, cams are made per order and take about 4-6 weeks to deliver. Our Mild cams and Hot cams are new cams, hardwelded (race quality) to our specifications, no core charge is necessary. All shipping is the responsibility of the customer.



Hot Big Valve Custom Cylinder Heads

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Designed for

Intense LOW and MID RANGE TORQUE!

Intake: 22% Increased Flow (max)

Exhaust: 41% Increased Flow (max)

Providing over 40 HP+ depending on your application. Our custom hot cylinder heads increase air flow for stunning performance and air velocity for insane low-midrange torque for acceleration. The Hot Cylinder Heads receive our custom porting, polishing and multi-angle valve job, for ultimate performance.

A graduated port finish maintains boundary turbulence for maximum fuel suspension while allowing maximum laminar velocities at the valve seat at all lifts. A properly shaped valve seat/port juncture in conjunction with proper combustion chamber modifications, help ensure maximum volumetric efficiency (cylinder filling). This will show dramatic flow increases at all lifts. Midrange and bottom end power will show insane gains and when coupled with complimentary intake modifications, a large top end increase will also be realized.

Pricing requires using customer supplied cylinder heads as cores.


*$6,999. (using customer supplied heads as cores )


*Price does not include processing fees, and shipping. Please be patient, each engine is made per order and takes about 6-8 weeks to deliver. All shipping is the responsibility of the customer. If new heads are requested, $1500 will be added to above pricing.



TURBO KITS

Subaru 1.8, 2.0 and 2.5 Engine W/T28 BB Turbo

Stage1 and Stage2

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If you are looking for the ultimate in high performance - this extreme performance packages are for you. Providing the maximum horsepower for the very discriminating and still providing dependability for daily driving. Incorporating all the high performance equipment in a superior performance package, this extreme package includes: an intercooler, blow off valve, and more.

The Stage1 Turbo kit : 6psi

- Garrett GT28R turbo and manifold pre-assembled (only run 6 PSI)
- Down pipe, catless mid pipe and gasket
- Polished uppiping
- High flow front mount intercooler
- Stainless steel braided oil line and fittings
- Stainless steel braided water lines for turbo cooling
- Rising rate fuel pressure regulator
- Blow-off valve (atmosphere)
- Air intake (connects to stock air box)
- Heat shield
- Oil return hose and oil pan fitting
- All hardware, pressure lines, hoses, clamps, and couplers, plus performance exhaust header included and a MAF sensor
- Recommend Upgrading Fuel Injectors and adding Engine Management, see options below


Note: Fabrication will be required for correct fitment, for each Subaru model. Turbocharger Kits should be installed by professionals. Normal installation depending on the vehicle takes around 30 hours, but depends on the amount of fabrication for your car. Extra modifications should include upgrading your fuel system and run premium fuel. For safest fuel delivery, you must upgrade your injectors. All orders are considered 'Special Order' and are paid in full at time of order via wire transfer. All pricing must be verified the day of quote, again at time of order, again at time of shipping and will be adjusted based on the value of the Dollar Internationally. Any deficiency is immediately due upon billing and before delivery. Patience is requested. Each Kit is made to order and requires a lead time of about 4 weeks. Contact us for product information. Please note, all power outputs stated are only approximations, for reference purposes and will vary depending on climate, each vehicle; its condition, tuning, fuel and modifications.


This is a high quality factory kit that surpasses all the home made kits available. The kit includes a Garrett water cooled ball bearing turbo, front mount intercooler, blow off valve and more.

Maximum of 6 PSI of boost for safety and reliability.

This should give you about 260CHP. About 100 horsepower over stock.

For best performance, upgrade your header, converters, catback and stock air box to a performance intake.

Stage1 : $3,900.00 USD plus shipping (call for quote)


Options:

- Piggyback ECU unit (wire-in, live tuning). $700.00 plus shipping

- Fuel Injectors Large capacity fuel injectors (440cc top feed injectors). Call for Prices

- Performance Intake For maximum air flow. $300.00 plus shipping

- Performance Header Improves mid and high RPM torque and power. $500.00 plus shipping

- Performance Converters Super Hi-Flow Catalytic Converters increase Air flow and Power. $650.00 plus shipping

- Performance Cat Back Exhaust Increased Performance. $850.00 plus shipping

Contact us for product information and pricing



The 2.5L Stage2 Turbo Kit : up to 18psi

- Garrett GT28R turbo and manifold pre-assembled
- Down pipe, catless mid pipe and gasket
- Polished uppiping
- High flow front mount intercooler
- Stainless steel braided oil line and fittings
- Stainless steel braided water lines for turbo cooling
- Rising rate fuel pressure regulator
- Blow-off valve (atmosphere)
- Heat shield
- Air intake (connects to stock air box)
- Oil return hose and oil pan fitting
- All hardware, pressure lines, hoses, clamps, and couplers, plus performance exhaust header included and a MAF sensor
- New STi Short block, STi pistons, rods, crankshaft; short block fully assembled (does not include gasket kit)
- Recommend Upgrading Fuel Injectors and adding Engine Management, see options below


Maximum of 18 PSI of boost for safety and reliability.

Note: Fabrication will be required for correct fitment, for each Subaru model. Turbocharger Kits should be installed by professionals. Normal installation depending on the vehicle takes around 30 hours, but depends on the amount of fabrication for your car. Extra modifications should include upgrading your fuel system and run premium fuel. For safest fuel delivery, you must upgrade your injectors. Piggyback ECU, wire-in, for live tuning. Using STi block will allow the 6psi recommended for the Stage1 Turbo kit to be increased up to 18psi, to see about 400CHP, for an insane power increase! All orders are considered 'Special Order' and are paid in full at time of order via wire transfer. All pricing must be verified the day of quote, again at time of order, again at time of shipping and will be adjusted based on the value of the Dollar Internationally. Any deficiency is immediately due upon billing and before delivery. Patience is requested. Each Kit is made to order and requires a lead time of about 4 weeks. Contact us for product information. Please note, all power outputs stated are only approximations, for reference purposes and will vary depending on climate, each vehicle; its condition, tuning, fuel and modifications.

For best performance, upgrade your header, converters, catback and stock air box to a performance intake, as well as, your clutch or torque converter.

Stage2 : $7,200.00 USD plus shipping (call for quote)


Options:

- Piggyback ECU unit (wire-in, live tuning). $700.00 plus shipping

- Fuel Injectors Large capacity fuel injectors (440cc, 600cc or 850cc top feed injectors) and fuel pump. Call for Prices

- Performance Intake For maximum air flow. $300.00 plus shipping

- Performance Header Improves mid and high RPM torque and power. $500.00 plus shipping

- Performance Converters Super Hi-Flow Catalytic Converters increase Air flow and Power. $650.00 plus shipping

- Performance Cat Back Exhaust Increased Performance. $850.00 plus shipping

Contact us for product information and pricing



SUPERCHARGER KITS ** PLEASE DESCRIBE THIS IMAGE **

Subaru 2.0L and 2.5L Engines

Stage1 and Stage2

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Stage2 Intercooled Kit shown above

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Using above dyno numbers:

2005 Impreza 2.0L GX / stock power 90 kw = 95 whp = 122 chp

2005 Impreza 2.0L GX / stock torque 141 s_Mn = 104 wtq = 135.8 ctq


8psi : 119 kW = 161 whp = 209 chp / 71.31% increase

8psi : 260 s_Mn = 192 wtq = 249.6 ctq / 83.80% increase


13psi : 126.3 kW = 169.4 whp = 220.2 chp / 80.49% increase

13psi : 290 s_Mn = 214 wtq = 278.2 ctq / 104.86% increase

(stock exhaust header, converters and catback used for both 8psi & 13psi examples)



Applying above power increases to USDM 2.5L SOHC Engine

Stock Power 2.5L engine : 165 chp / 166 ctq

8psi : 260 chp / 270 ctq

(stock short block, exhaust header, converters and catback 8psi examples)

13psi : 280 chp / 295 ctq

(stock exhaust header, converters and catback and STi Short Block used for 13psi examples)

Developed and manufactured utilizing the C30-74 Rotrex Supercharger, the Stage1 kit will put your non-turbo power into the same league as a WRX!

The Stage2 Intercooled kit produces more than 80% gain in horsepower over the stock 165chp and about 100% power gain in torque. This can be safely achieved with performance exhaust header, converters and catback.

The power delivery from the Rotrex Supercharger is extremely smooth with immediate boost without lag. With an OEM style installation this kit will provide you with a stealth look and immediate performance from your car.



Benefits of Stage1 Supercharger Kit
High quality Supercharger Installation
Designed to suit an internally stock factory engine
Does not require upgrading exhaust header, converters or catback
Over 70% power increase on a stock engine with minimal boost pressure


Stage1 Supercharger Kit : 8psi

Parts Included:
- Rotrex C30-74 Supercharger @ 8psi
- Rotrex Self contained Oiling system with Oil cooler
- Supercharger CNC machined Mounting bracket with idler pulley setup
- 5PK Ribbed drive belt
- Aluminum Intake piping with silicon hoses and hose clamps (MAF adapter plate supplied for MAF car)
- Recirculating bypass valve
- All high quality Fasteners and hoses required for Installation and a MAF sensor
- Recommend Upgrading Fuel Injectors and adding Engine Management, see options below


Maximum of 8 PSI of boost for safety and reliability.

This should give you about 260CHP. About 100 horsepower over stock. This makes the car very fast.

Note: Fabrication will be required for correct fitment, for each Subaru model. You will need to run premium fuel and upgrade your fuel system. For safest fuel delivery, you must upgrade your injectors, plus consider upgrading your converters, and catback for increased performance. You will need to increase your injector size, modify your fuel rails and fuel system plus consider upgrading your converters and catback, as well as, your clutch or torque converter. All orders are considered 'Special Order' and are paid in full at time of order via wire transfer. All pricing must be verified the day of quote, again at time of order, again at time of shipping and will be adjusted based on the value of the Dollar Internationally. Any deficiency is immediately due upon billing and before delivery. Each Kit is made to order and requires a lead time of about 4 weeks. Contact us for product information. Please note, all power outputs stated are only approximations, for reference purposes and will vary depending on climate, each vehicle; its condition, tuning, fuel and modifications.

For best performance, upgrade your header, converters and catback.

Stage1 : $4,490.00 AUD plus shipping

(contact us for drop shipping quote)

Contact us for product information and current US Dollar (USD) pricing


Options:

- Piggyback ECU unit (wire-in, live tuning). $700.00 USD plus shipping

- Fuel Injectors Large capacity fuel injectors (440cc top feed injectors). Call for Prices

- Air to Water Intercooler Kit includes: High efficiency Water to Air Intercooler with front mounted radiator, high flow water pump and high quality fasteners and hoses for installation. $2100.00 AUD plus shipping, must convert AUDs into US Dollars

- Performance Header Improves mid and high RPM torque and power. $500.00 USD plus shipping

- Performance Converters Super Hi-Flow Catalytic Converters increase Air flow and Power. $650.00 USD plus shipping

- Performance Cat Back Exhaust Increased Performance. $850.00 USD plus shipping



Stage2 Supercharger Intercooled kit : 13psi

Parts Included:
- Rotrex C30-74 Supercharger @ 13psi
- Rotrex Self contained Oiling system with Oil cooler
- Supercharger CNC machined Mounting bracket with idler pulley setup
- 5PK Ribbed drive belt
- Aluminum Intake piping with silicon hoses and hose clamps (MAF adapter plate supplied for MAF cars)
-
Recirculating bypass valve
- All high quality Fasteners and hoses required for Installation and a MAF sensor
- High efficiency Water to Air Intercooler with front mounted radiator and high flow water pump
-
Recommend STi Short block: you need to upgrade your engine block and internals to handle 13psi safely, see options below
- Recommend Upgrading Fuel Injectors and adding Engine Management, see options below

Maximum of 13 PSI of boost for safety and reliability.

Note: Fabrication will be required for correct fitment, for each Subaru model and extra modifications are required when tuning the boost above 8psi. You will need to run premium fuel and upgrade your fuel system. For safest fuel delivery, you must upgrade your injectors, plus consider upgrading your converters and catback, as well as, your clutch or torque converter for increased performance. Kit includes STi Short block: STi pistons, rods, crankshaft; short block fully assembled (does not include gasket kit) is required to run 13psi+ safely. Puts the Horse Power at about 300CHP range at the engine. All orders are considered 'Special Order' and are paid in full at time of order via wire transfer. All pricing must be verified the day of quote, again at time of order, again at time of shipping and will be adjusted based on the value of the Dollar Internationally. Any deficiency is immediately due upon billing and before delivery. Patience is requested. Each Kit is made to order and requires a lead time of about 4 weeks. Contact us for product information. Please note, all power outputs stated are only approximations, for reference purposes and will vary depending on climate, each vehicle; its condition, tuning, fuel and modifications.


For best performance, upgrade your header, converters and catback, as well as, your clutch or torque converter.


Stage2 : $6,490.00 AUD plus shipping


(contact us for drop shipping quote)





Contact us for product information and current US Dollar (USD) pricing



Options:

- Piggyback ECU unit (wire-in, live tuning). $700.00 USD plus shipping


- Fuel Injectors Large capacity fuel injectors (440cc, 600cc or 850cc top feed injectors) and fuel pump. Call for Prices


- Performance Header improves mid and high RPM torque and power. $500.00 USD plus shipping


- Performance Converters Super Hi-Flow Catalytic Converters increase Air flow and Power. $650.00 USD plus shipping


- Performance Cat Back Exhaust Increased Performance. $850.00 USD plus shipping


- STi Short block, includes: STi pistons, rods, crankshaft; short block assembled (does not include gasket kit). $3,300.00 USD plus shipping




Why Supercharge?!
 
The primary advantages of supercharging over turbo charging are instant throttle response and more boost at low engine speed. Because a supercharger is belt driven off the crankshaft, it can deliver boost the instant the throttle is opened.

The Rotrex C30-74 Supercharger is a Centrifugal Supercharger - which delivers immediate boost in a linear fashion in relation to engine speed- the faster the engine speed the more boost pressure is produced. This type of Supercharger gives you more power as speed increases.

The Rotrex supercharger adds anywhere from 75% to 100%+ more Power and Torque to an otherwise stock engine.

Rotrex manufactures a compact, efficient, highly reliable and low noise supercharger boasting state of the art traction drive technology. The traction drive transmits power through friction forces between its rolling elements.


Benefits of the Rotrex Supercharger

• Extremely adiabatic efficient (up to 82%) equals great cruising gas mileage
• Superior low end torque compared to other centrifugal superchargers
• Ultra-high mechanical efficiency (up to 99.2)
• High durability
• Superior throttle response
• Excellent fuel economy
• Engine durability
• Top performance
• No turbo lag

Supercharging will result in the following

* Substantial increases in power and torque - gains of over 100% can be safely achieved.
* Improved low down performance.
* Dramatically improved acceleration.



All engine modification components, except those that are exempt, 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.