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All images May Not be Vehicle Specific. For Display Purposes Only.

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

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

98-05 Subaru 2.5RS Borla Cat back Exhaust


The Borla catback exhaust for the 2.5RS is an excellent way upgrade to the look, sound, and performance of your car. Each system is built from premium T-400 stainless steel to give you the absolute best in performance and durability. Ultra-smooth mandrel bends ensure maximum flow and power while precision computer-controlled CNC manufacturing ensures an accurate fit. Best of all, Borla stands behind every system with a Million-Mile Warranty.

$700.00 Cat back System plus shipping

Stainless Steel Performance Catback Muffler

(304 Stainless Steel)

mufflerlong pipe


For those of you who want Performance.

Direct bolt on Rear muffler section is 3.5" resonated single tip. A favorite of enthusiasts for years. 50 state legal

Each system is made to order.

$800.00 plus shipping

HKS Hi-Power Exhaust Silent Hi-Power Exhaust
Hi-Power Catback
Inspired and designed from endurance and GT racing in Japan, HKS developed its Hi-Power Exhaust system for both turbocharged and naturally aspirated applications. HKS has incorporated this new race inspired offset muffler and piping design into many street applications, which offers a greater flow and higher-PRM power gains due to the less restrictive design. This is achieved by eliminating unnecessary bends for the straightest exhaust path.

For turbocharged applications, the large and smooth exhaust flow allows greater exhaust velocity for better mid-range boost response and high-RPM power. Naturally aspirated vehicles also benefit from greater exhaust flow capacity as engine tuning levels increase. Certain applications are available in a Silent Hi-Power version which has an inner silencer built into the muffler. Like Drager Exhaust systems, Hi-Power Exhaust systems are made from SUS304 stainless steel muffler and tip assemblies.

Material     SUS304
Piping     75mm
Sound (Close)     91dB
Sound (Idle)     79dB
Tip Size     120mm
Tip Style     HP(TYPE-S)

Fitment: 1998-2001 SUBARU IMPREZA RS 4Cyl 2.5L Each system is made to order.

$1600.00 plus shipping

Catalytic Converter - Front and Rear for 2.5L

Pre-Catalytic Converter and Main Catalytic Converter

Your car will truly become alive by just replacing your tired, old and restrictive Cat with the newest technology in Catalytic Converters. Air flow is increased dramatically, so even if you do not have a performance exhaust system, this Cat will greatly increase your HP and Performance. MagnaFlow Catalytic Converters combine efficient industrial design to produce a product that exceeds, rather than meets, the highest standards of product performance and efficiency in the industry. MagnaFlow uses both Ceramic and Metallic substrates with different combinations of cell density and wall thickness to meet vehicle specific requirements.

Even thought the manufacturer may list a converter as fitting your vehicle, please be aware instalation may require the use of welding, cutting and tube bending equipment that is readily available to most professional installers. Therefore, please use a professional installer for installation.

    5 year/50,000 mile External, 2 years/25,000 miles Internal


Heavy Metal Series; 2 in. Tubing/Inlet/Outlet; Overall L-33.25 in.; O2 Sensor Loc Pre/Post Conv.; Not Air Tube Kit Adaptable.

Not Legal For Sale Or Use On Vehicles Registered In CA. GASKET INCLUDED Front and Rear Replacement.

NOTE: Under Federal EPA regulation, replacement of original catalytic converters is allowed only if the original converter(s) is missing, or the vehicle has more than 50,000 miles or is at least five years old and the need for a replacement has been established and documented, or a local inspection program has determined the existing converter is in need of replacement.

 2.5NA - $550.00 Cat Only plus shipping

Contact us for correct application

Note: Some installations will need to extend the rear O2 sensor wire.

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.

Urethane hangers

Urethane Muffler Hangers

To reduce excessive exhaust movement, use Urethane hangers which are a direct replacement for the OEM hangers.

Urethane Exhaust Hangers (sold as set of 4) - $49.00 set of 4 plus shipping

Cold Air or Short Ram Intakes for 2.5 NAs 1998-2007

AEM cold air intake AEM short ram intake

The AEM Performance Air Intake Systems have been engineered to be an affordable and easy way to boost the horsepower and torque of your engine. The restrictive factory air filter and air intake housing are replaced with this AEM air intake system which was designed, tuned and dyno-tested to fit specific Subaru Impreza models. Air enters the system through an oversized AEM Dryflow synthetic washable air filter for outstanding air flow, filtration and performance. The sound your engine makes when accelerating is also modified to a fuller, more aggressive resonance allowing you to hear and feel the horsepower upgrade. The intake tubing is constructed from mandrel-bent aluminum featuring a durable chrome-like finish. This air intake system was developed to accommodate the engine's factory emissions control devices including the engine breather hose. The tapered cylinder shaped AEM Dryflow air filter is made from an oil-free, synthetic filter media that can be used for up to 100,000 miles before cleaning is needed (depending on driving conditions). The air intake system is easy to install with commonly available tools and it is backed by AEM's Lifetime Limited Warranty. Some AEM air intakes are not legal for sale or use in California and other states adopting California emission standards, while others are 50 state legal.

Polished Finish

Please specify MAP or MAF sensor and cold air or short ram

Subaru Impreza 2.5L 1998-2007: $355.00 plus shipping

Intake for 2.5 NAs 1998-2007

Weapon R intake

The Secret Weapon Intake was designed, to increase air intake volume to the engine. The concept is to create two different air velocity profiles, one traveling at higher speeds than the other. This technology increases air volume and speed to the engine, which naturally feeds the engine 3x more air than the conventional air intake system. The intake pipe is bent out of high quality 6061 Aluminum on our Automated CNC mandrel bender. Polished to a high show quality finish. The SW1 Air filter features a tuned velocity stack to increase velocity and decrease turbulence. Only Comes In Polished.

Polished Finish

Please specify MAP or MAF sensor

Subaru Impreza 2.5L 1998-2007: $295.00 plus shipping

AP Subaru 2.5L, Crank Pulley

The AP lightweight crank pulley for your Subaru EJ20, EJ22, and EJ25 motor is going to add about 7chp, lost from the OEM heavy pulley. The CNC machined aluminum pulley is made from high grade 6061 material and finished in either a Flat Black or Gloss Silver color. The pulley has been broached for a perfect fit and the redesigned lightweight center gives you the best possible advantage over the competition.

The AP pulley is the same diameter as the stock pulley. Keeping the diameter the same allows no issues to occur with the alternator as under driven pulleys do sometimes. Weighing only 1.0lbs, it is almost 5lbs lighter then stock. This is also the lightest crank pulley on the market. This gives you quicker throttle response as well as more horsepower and torque. Saving on rotating mass results in better performance.

The AP pulley is a great performance part for your Impreza, WRX, STI, Legacy, and Forester vehicle.

$200.00 plus shipping


The SMT PIGGY-BACK ECU has been designed to answer the question

“how is my car going to get tuned”?


The SMT8 piggy-back system has unparalleled performance and a quantum leap of technical innovation. This is all possible with the latest 16 bit DSP processors, crammed full of features that you've never seen before. T

One of the new features is the fully programmable engine protection, which monitors the engine's performance. Should anything exceed the engine's specifications, the SMT8 will gradually reduce the engine's power after a programmable time delay, in essence looking after your engine. This is absolute MAGIC!

The external display output is also new for the SMT8 series. It allows our digital display to receive data from the SMT8 and selectively display the desired value without the presence of a PC. The displays are small with bright attractive LED colour options. Multiple values can be displayed on a single display by simply toggling between them.

An average installation consists of connecting 6 wires to the vehicle's ECU wiring loom, changing the settings of the SMT8 in the setup section of the LetRipp II Tuning Software and voila - you are ready to re-tune the vehicle. An experienced installer can install an SMT8 unit within 30 minutes for a basic installation. The primary features of the SMT8 will take longer to install, simply because there are more wires, but it is worth the wait.

The SMT8 can drive one extra injector (13 ohm) for supplementing fuel at high boost. The extra injector can be controlled via Throttle/RPM, AMP and Engine Temp maps. This allows for precise fuel delivery at boost conditions - a feature which is very popular with turbo and supercharger installations.

Set-points is a feature which makes the SMT8 stand apart from the other piggy back chips. It allows for the implementation of gear shift lights, fan control, idle assistance to mention a few. It has three relay outputs which can be switched on via 14 different signal sources. All Set-point functions can be combined in a logical fashion, and full polarity (higher than/lower than) selection is possible, even switching between the two operating maps is possible.

Two full operating maps (Map A and Map B) are present in the SMT8. Each operational map is capable of being switched into operation in real time while you drive or even when your Set-point function comes true. Switching between the two maps can also be achieved by having an external dash board switch installed, having one operational map for max power and the other for fuel consumption. The options are endless! The LetRipp II Tuning software is able to switch and lock operational maps to facilitate the tuning process.

Two wide band LSU-4 channels can be tuned simultaneously with the SMT8 version 3. This is feature is the major difference between version2. A large 16 x 24 map (384 tune sites) allows for the precise AFR (Lambda) signal modification via the two wide band inputs and outputs. The AFR is mapped via Throttle/RPM, AMP and Engine temperature. Two narrow band AFR (Lambda) probes can also be tuned simultaneously with the two wide band probes. This feature is invaluable for V6 and V8 applications where there are two wide bands probes and two narrow band probes. All 4 lambda probes can be tuned at the same time with one SMT8 unit.

Detailed HELP is available on the unit while the software screen is open. Simply move your mouse over an item and right click and hold down the button. A help description will appear detailing the function of that item. This help feature is invaluable because you get the help from the unit and not from an out of date printed manual. The software manual is also provided with every purchase and should be used as a reference guide, where the item help should be treated as the Holy Grail.

The mapping of all this is done via a high speed USB port and the user friendly, state-of-the-art LetRipp II Tuning Software. All tuning is done in real time and all entered values have immediate effect on the operation of the unit. All in all the SMT8 is the best piggy-back system on the market. It can do everything ... except make a cup of coffee!

SMT8-USER KIT $700.00 plus shipping

SMT8 User Kit:

1 x SMT8 Standard Piggy-Back Controller
1 x SMT8 Tuning Harness
1 x USB Communication Cable
1 x CD with LetRipp Software and Manuals


System definition Tailor the unit to your application
Ignition advance/retard limits Restricts ignition modification range
Start second specification Prevents action after power-up
Analogue Upper/Lower limits Prevents analogue over-ranging
Frequency modification Tune a frequency airflow meter
Frequency upper/lower limit Prevents frequency over-ranging
Boost control Controls the turbo boost
Boost loop gain parameter Set the Boost control gain
Cut protection action Signal cut when protected
Retard protection action Retards ignition when protected
Modify protection action Proportional protection
Frequency protection Protects a frequency signal
AMP protection Protects an AMP signal
Engine Temp. Protection Protects the engine temperature
Air Temp. Protection Protects the air temperature
RPM protection Protects RPM
Time before protection action Specify time before action takes place
Ignition window For not so perfect crank signals
Analog modification channels Allows you to map two engine signals
Wide band AFR modification Allows two banks AFR tuning
Narrow band AFR modification Two after-CAT modifications
Tune narrow from wide AFR Map both Narrow and wide AFR together
CUT AMP+ENGT protection Cut Protection with logical AND
Retard AMP+ENGT protection Retard protection with logical AND
External display specification Tailor your display needs
TPS calibration Adopt to your TPS sensor
TPS direction Specify Up/Down direction
Engine temp. Calibration Two-point adaptation to your engine
Air Temp. Calibration Two-point adaptation to your engine
AMP calibration Linear adaptation to your engine sensor
RPM calibration Set the operating range
Set-point control operates any of 3 outputs
Two RPM set points Switch action on RPM limit
Two temperature set points Switch action on temperature
One AMP set point Switch action on AMP
One TPS set point Switch action on TPS
Two analogues input set points Switch action on two analogue inputs
Two analogues output set points Switch action on two analogue outputs
Two narrow AFR set points Switch action on narrow AFR
Two wide AFR set points Switch action on wide AFR
Two injection set points Switch action on injection length
One Boost set point Switch action on Boost
Logical combination of set points Logical AND, OR
Map switching from set points Invoke different tuning map
External display testing Verifies the external display function
Teeth per injection setting Operates the external injector timing
Teeth per crank turn Adapt to your crank trigger wheel
Edges per crank turn Adapt to your crank trigger wheel
Acceleration enrichment Extra fuel when it’s needed
Ignition map with 384 points For three dimensional Ignition tuning
Ignition AMP map Provides AMP ignition tuning
Ignition Engine temp. map Provides Engine temperature ignition
Ignition Air temp. map Provides Air temp. ignition tuning
7 steps per degree ignition Very fine ignition replica
Injection map with 384 points Two maps for two injection activation
Injection AMP side map Provides AMP injection tuning
Injection Engine temp. side map Provides engine temp. injection tuning
Injection Air temp. side map Provides air temp. Injection tuning
Analogue maps with 384 points For fine tuning of two analogue signals
Analogue AMP side map Provides analogue AMP tuning
Analogue Engine temp. side map Provides analogue Engine temp. Tuning
Analogue Air temp. side map Provides Analogue Air temp. Tuning
Frequency or PWM tuning Both signals can be tuned
Frequency map with 384 points For fine tuning a frequency/PWM signal
Frequency AMP side map Provides frequency AMP tuning
Frequency Engine temp. side map Provides frequency engine temp. tuning
Frequency Air temp. side map Provides frequency air temp. tuning
Boost basic PWM setting Two PWM settings for different loads
Boost air temp. map Different PWM settings for different loads
Boost Target map Precise boost target control
Manual map switching From the dashboard
Automatic map switching From the set point control
PC map switching For loading set ups in to different maps
USB 2.0 communication Communication and optional power
Built-in factory test With dates and results
Administration text field For saving manufacturing data
Dealer info text field For dealer identification
Branding text field Branding information
Password text field Access control
Maximum RPM recording User retrievable recording
Maximum Engine temp. record User retrievable
Maximum Air temperature User retrievable
Maximum AMP recording User retrievable
Fault indication on all major items Easy installation and trouble shooting
Re-flash enabled Field upgradeable
Altitude compensation For influencing fuel mixture
Comprehensive help text Easy understanding without manual
27 point hardware test procedure Tests every hardware function
Engine real-time data For monitoring and display