Email us at sales@boxer4racing.com

Transmission Accessories

Transmission and Gears

Clutch and Flywheel

Transmission Coolers

 

 

 
 

Transmission Accessories

Short Shift Kit for STi 2004-up. GFB STi Adjustable Short Shifter....THE shortest throw shifter on the market for your Subaru! Less time changing gears means more time on the throttle! Working on a different principle to other products on the market, the GFB Short Shifter can be adjusted to reduce the throw by up to 40% over standard (more for early models), significantly shorter than even an STi factory upgrade! Like all GFB components, the Short Shifter is well engineered and manufactured from the highest grade materials.

GFB on the other hand, supply a unique bracket that clamps to the gearbox shift linkage and allows the pivot point to be raised up to 40mm above standard! On the shortest setting, the throw is a tiny 30mm per gate! In fact, the LONGEST setting on our shifter is STILL SHORTER than everyone else.

$339.00

$309.99

Short Shift Kit for WRX 2002-up. GFB WRX Adjustable Short Shifter....THE shortest throw shifter on the market for your Subaru. Less time changing gears means more time on the throttle! Working on a different principle to other products on the market, the GFB Short Shifter can be adjusted to reduce the throw by up to 40% over standard (more for early models), significantly shorter than even an STi! Like all GFB components, the Short Shifter is well engineered and manufactured from the highest grade materials.

GFB on the other hand, supply a unique bracket that clamps to the gearbox shift linkage and allows the pivot point to be raised up to 40mm above standard! On the shortest setting, the throw is a tiny 30mm per gate! In fact, the LONGEST setting on our shifter is STILL SHORTER than everyone else.

$249.00

$229.99

Stainless Steel Braided Clutch line for WRX and STi. Improve the feel of the clutch pedal with this stainless steel braided clutch line. It comes with heavy duty reinforced ends and new hardware for installation.

$39.99

KARTBOY short shifter for STi 6 Speed. Overall shift throw is decreased by 40%, providing a noticeable difference and a solid feel. Constructed of high-tensile steel and low-friction acetal (Delrin®). Installs with simple mechanic's tools in under 30 minutes.

$149.95

KARTBOY shifter bushings for STi 6 Speed.

$34.99

STi Braided Steel Clutch Hose. STi clutch hose for all new age turbo applications provides improved clutch pedal feel and reliable operation. Hose features a Teflon inner liner with stainless steel over braid for resistance to expansion under high pressure. Hose has clear plastic covering and pink strain relief's for a cleaner appearance.

$94.99

STi Severe Duty Drivetrain Mounts for WRX and STi. Recently homologated for group N rally use. Revised drivetrain mounts are designed specifically to handle the most abusive environments. Based on WRC experience with the harsh conditions of the Safari rally and elsewhere.

Motor
$489.00

Tranny
$108.00

Energy Suspension Shifter bushing for Impreza WRX. Energy suspension shifter stabilizer bar bushing made of high performance urethane. One piece design offers better shifter feel over stock soft rubber design from the factory.

Must be pressed in.

$9.99

KARTBOY short shifter for Impreza WRX. Overall shift throw is decreased by 40%, providing a noticeable difference and a solid feel. Constructed of high-tensile steel and low-friction acetal (Delrin®). Installs with simple mechanic's tools in under 30 minutes.

$99.95

KARTBOY shifter bushings for the Impreza WRX

$34.99

KARTBOY Short shifter & shifter bushing COMBO for WRX.

$119.00

Perrin Short shifter for Impreza WRX. The first adjustable short shifter adapter on the market. The Perrin short shifter retains the original shifter lever with its anti vibration shaft.

Simple one bolt adjustment allows you to easily adjust the shifter throw. Easy 15 minute install.

$79.99

Short shift lever for WRX.

What Is A B&M Short Throw Shifter?
A B&M Short Throw Shifter is a direct, bolt-on, self-contained unit. When you buy a B&M Short Throw Shifter, along with the complete shifter unit, you get explicit installation instructions. Installation usually takes about 30 minutes with nothing more than ordinary hand tools.
 

Why Should I Buy A B&M Short Throw Shifter?
A B&M Short Throw Shifter offers a dramatic improvement in shifting performance due in large part to reduced shifter travel, or ‘shift throw’.
 

Why Should ‘Shift Throw’ Matter To Me?
‘Shift throw’ refers directly to actual physical travel of the shifter stick - thus affecting the time it takes to shift from one gear to another (see illustration). In a performance situation, the additional seconds (or fractions of a second) a factory stock shifter takes to go from one gear to another can result in slower elapsed times - or just a sluggish feeling when driving around town. A B&M Short Throw Shifter eliminates that sluggish feeling in a daily driver, and gives the racer an extra edge.
 

Why Should I Buy A B&M Shifter?
B&M has been in the shifter technology business for almost 50 years. No one has as much time invested in the research, development and practical application of shifter/transmission performance than B&M. If you want a half-century of experience behind you and your vehicle’s shifter - buy B&M.

 

$159.99

STi Pitch Stop Mount Group N for Impreza WRX. Improves stability of the top of the transmission.

$58.00

STi Group N Transmission Mount for Impreza WRX

$79.99
each.

STi Motor Mounts Group N for WRX

$69.99
each.

Cusco Motor and Transmission Mount Kit for WRX and STi. Heavy duty mount kit with solid bushings designed to keep engine and transmission movement at a minimum.

Direct replacement for the stock mounts. No modification necessary.

$289.00

Transmission and Gears

STi Helical Front LSD. Used on certain exclusive STi models (and is now replacing the Suretrac unit for the Spec C in Japan). This factory helical front LSD features torque sensitive operation in a progressive and quiet manner. Ideal for road and track use in moderate power applications.

$1049.00

STi Heavy Duty Viscous Center LSD 5-speed. Increases LSD action of the center differential from 4kgf-m/100rpm stock setting to 20kgf-m/100rpm. This dramatically improves LSD response time reducing wheel spin and improving reliability on low-grip surfaces. Ideal for rally use.

$969.00

STi Heavy Duty Viscous Center LSD 6-speed. Increases LSD action of the center differential from 4kgf-m/100rpm stock setting to 20kgf-m/100rpm. This dramatically improves LSD response time reducing wheel spin and improving reliability on low-grip surfaces. Ideal for rally use.

$999.00

AP Suretrac Rear LSD. Factory LSD used on certain STi models. Uses a face cam and follower arrangement to provide torque sensing. For use with late model R160 differentials.

$919.00

STi Pressure Ring Set for 2004-up STi Rear Differential. Increases the pressure angles of the stock R180 plated LSD (STi models) from 45 degrees to 60 degrees in order to improve throttle sensitivity for competition use. LSD will operate quicker and more effectively.

$299.00

Quaife ATB Differential for WRX. The Quaife torque biasing differential enables your car to accelerate quicker and corner faster. How? By getting the power to the ground!

The Quaife is great for street driving or racing. Racers don't have to put up with locking mechanisms or spools that tear the steering wheel out of their hands when cornering. Because it behaves like an open differential during ordinary driving, street drivers will have trouble telling it's there until pushing the car's limits.

The Quaife has been proven in everything from SCCA Rally to Formula 1. It provides autocrossers with such an advantage, it has become "required" equipment for a winning effort.

In cornering, while accelerating out of a turn, the Quaife biases power to the outside wheel, reducing inside-wheel spin. This allows the driver to begin accelerating earlier, exiting the corner at a higher speed.

The Quaife also controls loss of traction when the front wheels are on slippery surfaces such as ice and snow or mud, providing the appropriate biased traction needed to overcome these adverse conditions. The Quaife Differential provides constant and infinitely variable drive. Power is transferred automatically without the use of normal friction pads or plates seen in other limited-slip designs.

The Quaife's unique design offers maximum traction, improves handling and steering, and puts the power where it is needed most. A definite advantage whether on the track or on the street.

The Quaife is extremely strong and durable and since the Quaife is gear operated, it has no plates or clutches that can wear out and need costly replacement.

Front Diff

$1,495

Rear Diff

$1,495

STi Standard Ratio Gearset with a revised dual cone upgraded 1st synchro & hub set for WRX.  STi standard ratio gears feature a 5th gear that is identical to the stock WRX for those wishing to maintain the same highway performance. However, these gears provide improved reliability of the 5MT through similar hardening and strengthening features as found on the STi RA set listed below. Gearset includes all necessary parts for installation.

Professional installation is recommended.

$1,599

STi Type RA Synchromesh Close Ratio Gear Sets for 5-Speed WRX. Factory Ver.6 STi and STi RA 5-speed close ratio gear sets with special cryogenic stress relieving treatment with micro finish coating. Improved strength and durability over stock WRX components. 1st & 2nd gear width increased by approx. 1mm vs. standard WRX. Gear tooth root thickness also increased substantially on most gears as shown in the picture. Excellent for mildly tuned street and group N competition vehicles. Note: Gear kits come with main shaft, gears, locknuts, case gasket, oil seal, custom speedometer gear, thrust washer, and other special components required to adapt the gear set to the standard MY02-04 WRX.

STi RA ratios: 3.083 (1st), 2.062 (2nd), 1.545 (3rd), 1.151 (4th), 0.825 (5th)

$1,599

Clutch and Flywheel

Advanced Clutch Technology XACT Street Flywheel for WRX. ACT XACT flywheels provide significantly improved engine response, acceleration and a higher degree of safety than the heavy stock flywheel.

Specs 13.9 pounds. SFI Certified

$325.00
$259.99

Advanced Clutch Technology XACT Street Flywheel for STi. ACT XACT flywheels provide significantly improved engine response, acceleration and a higher degree of safety than the heavy stock flywheel.

Specs 15 pounds. SFI Certified

$423.40
$349.99

Advanced Clutch Technology Street Clutch Kit for STi. ACT Performance Street Discs are designed for smooth engagement, quiet operation and improved durability using only the best organic linings and spring center designs.
Rated 475 ft/lbs torque capacity with a clamp load increase of 35%

ACT clutches deliver the maximum holding power by applying a series of sound engineering advancements to new (not rebuilt) components which maximizes load and reduces flex. The result is maximum torque capacity, long life and smooth, fast shifting. ACT is a premier clutch manufacturer that has more than 300 different applications and more than 500 performance clutch kits. The company’s product line features clutches and forged flywheels for the most popular vehicles in the sport compact car market. ACT is headquartered in Lancaster, California.

$914.44
$689.99

  Advanced Clutch Technology Street Clutch kit for WRX. ACT Performance Street Discs are designed for smooth engagement, quiet operation and improved durability using only the best organic linings and spring center designs.
Rated 411 ft/lbs torque capacity with a clamp load increase of 35%
Torque Capacity: 411 ft .lbs
Pressure Increase: 30 % over Stock
Weight: 15 lbs.

$783.37
$589.99

Advanced Clutch Technology 6 Puck Race Clutch kit for WRX.
Torque Capacity: 527 ft .lbs
Pressure Increase: 30 % over Stock
Weight: 15 lbs.

Not recommended for street use due to harsh engagement.

$751.56
$629.99

OEM Original Equipment Manufacture Clutch Kit for Impreza WRX. Complete original manufacture aftermarket equivalent clutch kit which is a direct replacement for the factory unit in your car now.

Includes: Clutch, Pressure Plate, Release Bearing, Pilot Bearing and Alignment tool.

$249.00

OEM Original Equipment Manufacture Clutch Kit for 2004 STi 6-speed. Complete original manufacture aftermarket equivalent clutch kit which is a direct replacement for the factory unit in your car now.

Includes: Clutch, Pressure Plate, Release Bearing, Pilot Bearing and Alignment tool.

$359.00

Single Plate Organic Clutch Setup for WRX.

EXEDY
Racing clutches with organic friction materials use only premium friction materials that are resistant to slippage and burst. Increased clamp loads give the necessary capacity to handle modified engines.

The driveability will be like a stock clutch. Pedal efforts will be higher because of the higher clamp loads. All of our clutch discs have high capacity spring center dampers to reduce the drive train shock and impact.
Includes: Clutch, Pressure Plate, Release Bearing, Pilot Bearing and Alignment tool.

$547.00
$499.00

Single Plate Cerametallic Clutch Setup for WRX.

EXEDY cerametallic clutches are designed to handle the abuse of high power modified engines. Our cerametallic friction material can handle much more slippage than stock type disc assemblies without slipping and fading.

All EXEDY cerametallic clutch discs have spring center dampers to reduce the impact and shock loads put into the drive train. This protects the transmission and the rest of the drive line system. We offer two types of cerametallic discs -normal thickness and reduced thickness. The reduced thickness (thin cerametallic) discs offer greatly reduced inertia to improve shift efforts, make for faster shifting, and improve synchro durability. These discs are approximately 1/2 the thickness of a stock disc. The normal thickness (thick cerametallic) discs have better heat capacity and therefore better durability in demanding applications such as all wheel drive. Even with the normal thickness, our three puck cerametallic discs still typically have less inertia than a stock disc. With any cerametallic clutch system, there will be some compromise of start up driveability as compared to a stock clutch (chatter on light throttle, low rpm start up). This characteristic is generally felt to be acceptable in modified performance cars. Drivers of cerametallic clutches on the street should be warned not to "ride the clutch" to try to reduce the chatter as this will greatly increase the wear.
Includes: Clutch, Pressure Plate, Release Bearing, Pilot Bearing and Alignment tool.

$699.00
$529.00

Single Plate Cerametallic Clutch Setup for 2004-up STi.

EXEDY cerametallic clutches are designed to handle the abuse of high power modified engines. Our cerametallic friction material can handle much more slippage than stock type disc assemblies without slipping and fading.

All EXEDY cerametallic clutch discs have spring center dampers to reduce the impact and shock loads put into the drive train. This protects the transmission and the rest of the drive line system. We offer two types of cerametallic discs -normal thickness and reduced thickness. The reduced thickness (thin cerametallic) discs offer greatly reduced inertia to improve shift efforts, make for faster shifting, and improve synchro durability. These discs are approximately 1/2 the thickness of a stock disc. The normal thickness (thick cerametallic) discs have better heat capacity and therefore better durability in demanding applications such as all wheel drive. Even with the normal thickness, our three puck cerametallic discs still typically have less inertia than a stock disc. With any cerametallic clutch system, there will be some compromise of start up driveability as compared to a stock clutch (chatter on light throttle, low rpm start up). This characteristic is generally felt to be acceptable in modified performance cars. Drivers of cerametallic clutches on the street should be warned not to "ride the clutch" to try to reduce the chatter as this will greatly increase the wear.
Includes: Clutch, Pressure Plate, Release Bearing, Pilot Bearing and Alignment tool.

$589.00

Hyper Single  Clutch Setup for WRX and STi.

The Hyper Single Clutch is engineered to optimize performance for cars that are moderately modified, but do not require the clutch capacity of a multi-plate clutch. Similar to our multi-plate clutches, it has a forged aluminum cover that is anodized purple. The aluminum cover is stiffer than a stamped cover and therefore allows a higher lever ratio to maintain the pedal efforts at a reasonable level.


All Hyper Clutches come with a steel flywheel and a 6-puck cerametallic facing, spring center damper disc assembly. The disc is generally smaller and thinner than the OEM disc making for lower inertia and therefore quicker, easier shifting and less wear and tear on the transmission synchros. The higher clamp load and cerametallic friction facings give approximately twice the holding torque of the OEM clutch and generally higher than other single plate clutches.

As with all cerametallic clutches, the street driveability may be marginal due to chattering and harsh engagement characteristics.

An additional feature of the pressure plate is a series of turbine-like, air flow enhancing vanes that keep the clutch cooler under extreme operating conditions to improve wear life.
Includes: Flywheel, Clutch, Pressure Plate.

$1,089.00

Multi Plate  Clutch Setup for WRX and STi.

For high-powered applications, EXEDY offers twin and triple Multi-Plate Clutches. These are designed for hot street action as well as drag, road and rally racing.

The twin plate clutches are rated for above 500hp to 750hp. The triple plate clutches are rated for up to and over 1000hp (for drag race applications). Twins come as with both spring damper discs and solid discs. Triples are all solid discs.

All of our multi-plate clutches come with a lightweight, chrome moly steel flywheel and the famous purple anodized forged aluminum clutch cover. Depending on the application, we have both strap drive and lug drive models. All have T5001 cerametallic friction materials for extreme heat resistance.

Engine modifications eg. cam-timing-turbo modifications etc. cause engine pulsation and vibrations. These vibrations can cause clutch rattle when the clutch pedal is depressed by movement on the intermediate separator plate in some applications. These noises will in no way affect the performance of the Exedy Multi Plate Clutch. This rattle is well accepted in the performance industry where engine modifications have been carried out.
Includes: Flywheel, Clutch, Pressure Plate.

$1,669.00

Light Weight Flywheel for WRX.

EXEDY
Racing Flywheels are made from solid one-piece billet chrome-moly steel or chrome moly steel forgings. They are specifically designed to reduce weight and inertia for better engine response. Most incorporate special design features to enhance the air flow to improve the cooling of the clutch. The ring gear teeth are milled onto the flywheel unlike an aluminum flywheel where the ring gear is pressed onto the flywheel which has the possibilities of separating from the flywheel. This could cause the flywheel to explode due to two different expansion coefficients (aluminum flywheel pressed on steel ring gear). EXEDY steel billet and forged steel flywheels have passed engineering tests to 15,000 rpm. They are guaranteed to be explosion proof at the said rpm. 12.7lbs (5.8 kg)

$399.00

UNORTHODOX Ultra Light Aluminum Flywheel for Impreza WRX and STi 11 .lbs

$439.00

Transmission Coolers

Flex-A-Lite  "Thin" Transmission cooler for WRX Automatic. The key to automatic transmission life is keeping the fluid fresh, clean, and cool. When fluid temperatures exceed the optimum operating range of 160°F to 200°F it begins to break down, decreasing the life of the fluid and in turn the life of the seals, bearings and all moving parts.

Tests have proven that a 20 degree drop in transmission fluid temperature can double the life of automatic transmission components. Cooler tranny oil gives more reliable, consistent shifts under racing conditions, and prevents transmission damage under extreme towing conditions. These coolers provide a reliable means of cooling your auto transmission.

$49.99

Flex-A-Lite "Heavy Duty" Transmission cooler for WRX Automatic. The key to automatic transmission life is keeping the fluid fresh, clean, and cool. When fluid temperatures exceed the optimum operating range of 160°F to 200°F it begins to break down, decreasing the life of the fluid and in turn the life of the seals, bearings and all moving parts.

Tests have proven that a 20 degree drop in transmission fluid temperature can double the life of automatic transmission components. Cooler tranny oil gives more reliable, consistent shifts under racing conditions, and prevents transmission damage under extreme towing conditions. These coolers provide a reliable means of cooling your auto transmission.

$59.99

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* Prices are subject to change.

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Copyright © 1998-2010 Teague's Auto dba Boxer4Racing
Last modified: February 02, 2010. This site is not affiliated or endorsed by Subaru of America, Fuji Heavy Industries or STi. We are not an authorized parts dealer or repair shop for Subaru of America, Fuji Heavy industries or STi. Work and Parts are not guaranteed by Subaru of America, Fuji Heavy Industries, STi. All performance parts are listed for off road use only. Always check your local laws before adding aftermarket parts to your automobile.
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