Drivetrain Modifications for the 2004


	2004 STi Knuckles and Hubs
	These are the full Knuckle and Hub assemblies out of the 2004 Subaru STi. The 2004 model year was the only year of the STi released in the USA with the 5x100 bolt pattern. In 2005, the STi's received the 5x114.5 hubs. This is mainly an issue with wheel fitment, however, the distance between the two bolts which ... (read more...)
	Regular Price: $2,111.89 On Sale For: $1,650.00	Quantity:

	ACT Lightweight Flywheels for the 2004+ STi
	Most stock flywheels are heavy cast iron and are designed for optimum drivability by storing some of the engine’s power in the form of inertia. Light flywheels provide significantly improved engine response and acceleration by compromising drivability. ACT flywheels are designed for improving engine response, strength, and affordability. ACT offers lightweight flywheels for the STi in two trim levels, Streetlite and Prolit... (read more...)
	Price: $340.08	Quantity:

	Clutch Masters FX 300 Clutch for the WRX and STI
	Clutch Masters FX300: The Ultimate Single Disk Clutch for the serious Street Enthusiast. The Clutch Masters FX300 System uses the Power Plus I Pressure Plate with a Steel Back Segmented Kevlar disc. This clutch is designed for the ultimate street enthusiast or weekend racer running a normally aspirated car equipped with cylinder head work and/or hotter cam(s), or with medium-boost turbo or super-charger... (read more...)
	Regular Price: $745.00 On Sale For: $670.50	Quantity:

	Clutch Masters FX 400 6-Puck Clutch for the 2004+ STI
	Clutch Masters FX 400: The Extreme Duty Sprung Ceramic Clutch for High Horsepower Applications. The Clutch Masters FX400 System uses the Power Plus I Pressure Plate with a custom, extremely durable, Sprung Ceramic disc. This is the ultimate extreme duty street and/or road/drag racing system. It is available in a 4 or 6 wing (paddle) configuration, with the 4-wing being the more aggressive setup (availa... (read more...)
	Regular Price: $795.00 On Sale For: $715.50	Quantity:

	Cobb Double Adjustable Short Throw Shifter
	Cobb Double Adjustable Short Throw Shifters are back! Cobb's revolutionary Double Adjustable Shifter ushers in a new generation of adjustability for one of the most critical links from driver to car, with the ability to control both the height of the shift knob as well as the length of the shifter throw. <... (read more...)
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	Cusco Heavy Duty Motor and Transmission Mount Kit for WRX, STi, and GC8
	Back In Stock and Read to Ship! Specially designed by Cusco for each application, these mounts are completely new. These are not cheap mount inserts; these are completely custom designed, complete mounts for the WRX. Perfect for those customers looking to drastically reduce engine movement. These differ from the OEM and Group-N Mounts in that there are two metal p... (read more...)
	Regular Price: $370.00 On Sale For: $318.00	Quantity:

	Exedy OEM Replacement Clutch Kit for the 04+ STi
	Exedy is the manufacturer of the OEM (original equipment) clutch that comes in the STi. If the time has come to replace your clutch, buying this kit directly from the manufacturer is a great way to get a great clutch at a great value. This kit is identical to the clutch that you would get from a Subaru Dealership, but it is less than half the price. (read more...)
	Price: $292.00	Quantity:

	JDM-Close Ratio 5th and 6th plus Synchro Up-Grade for 6MT
	This kit includes a new 5th and 6th gear for the 6-Speed transmission that came in the USDM STI, and new Carbon Synchros (baulk rings) for 4th, 5th and 6th gear. The new ratios for 5th and 6th gear are: 5th - 1.062 6th - .842 This will help turn your STI transmission into a close ratio gear box, and improve shifting between 4th, 5th, and 6th gear. This also con Use to improve on problematic 4th, 5... (read more...)
	Price: $518.30	Quantity:

	Kartboy Engine Pitch-Stop Mount
	Now with FREE SHIPPING! Kartboy has designed this Engine Pitch Stop Mount to replace the OEM Pitch Stop Mount on all Turbo Subaru's from 2002 on. This piece is made from billet aluminum, and has po... (read more...)
	Price: $125.00	Quantity:

	Kartboy Short Shifter and Bushing Combo for STi 6 Speed
	Save money when upgrading to the Kartboy short shifter and shifter bushings by buying them all at once! (read more...)
	Regular Price: $225.00 On Sale For: $200.00	Quantity:

	Modena Limited Slip Differentials for the 6-Speed transmission and R180 Rear Diff.
	Just released to the US Market! Modena looked at the options for differentials available for the Subaru STI 6-Speed transmission, and saw that there was not much in the way of a true motorsports differential. For this reason, Modena has released a set of differentials for the Subaru 6-Speed STI Transmission for motorsport applications that a... (read more...)
	Price: $2,500.00	Quantity:

	Motul 75W90 Gear Oil
	Motul offers several different types of 75W90 transmission fluids. The Motul Gear 300 is their full synthetic fluid, while the Motylgear fluid is their "technosynthese" is a semi-synthetic option. Here is a small description of both fluids: (read more...)
	Price: $21.09	Quantity:

	OEM Subaru Flywheels for WRX, STi, and Legacy GT
	This is a brand new OEM Subaru Flywheel for the WRX, STi, or Legacy GT These pieces are brand new straight from Subaru! Please ensure you choose the correct flywheel for your application. If you are not sure which flywheel you need, give us a call or email us with the last 8 digits of your VIN number and we can make sure you are ordering the right piece. ... (read more...)
	Regular Price: $279.95 On Sale For: $223.96	Quantity:

	Subaru Clutch Alignment Tool
	This tool is needed for every Subaru clutch install on almost all models. It is used to align the ... (read more...)
	Price: $9.00	Quantity:

	WRX & STI Rear Differential Flange
	This is the flange that attaches directly to the pinion shaft of the rear differential on your WRX or STI, and bolts to your propellor shaft. The bolt pattern is different between the WRX R160 differential and the STI R180 differential, so if you are doing a 6-speed swap, this part may be helpful. The Subaru Part # for the WRX Flange is 38358AA000 The Subaru Part # for the STI Flange is 38358AA040 Please note that ... (read more...)
	Regular Price: $111.75 On Sale For: $89.50	Quantity:

	Cobb Tuning Shift Knob (5MT + 6MT)
	We Now Offer Free Shipping On All COBB Parts!!!!!!!!!! COBB Tuning announces the immediate availability of the COBB Knob, the hottest shift knob available for Subaru STi, WRX and RS models. The COBB Knob is a fusion of the highest quality materials that, when properly mated, produce a shift knob that feels a... (read more...)
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	JDM STI S204 Style Shift Knob
	This authentic STI shift knob is wrapped it top quality leather, and has the shift pattern on top in red lettering, which is very similar to the shift knob that came on the S204 version of the STI. (read more...)
	Price: $212.50	Quantity:

	Subaru Duracon Thermo-Plastic JDM STi Style Shift Knob
	Originally available only to the Japanese Market, the STi Duracon Thermo-Plastic shift knob is ergonomically designed, and should never crack or fade. (read more...)
	Price: $69.99	Quantity:

	Kartboy Short Shifter for 04-07 STi
	Now with FREE SHIPPING! This is Kartboy's Short Shifter for the 04-07 STi. It will work on both width STi shift linkages, either using or discarding the included black spacers. Th... (read more...)
	Regular Price: $150.00 On Sale For: $150.00	Quantity:

	Goodridge WRX (02-05) and STI (04+) Stainless Steel Clutch Line
	Goodridge stainless steel braided brake-lines are an industry standard in the world of motor racing. They have now applied the same technology to the Clutch Line for the Subaru WRX and STI to provide enhanced pedal feel. (read more...)
	Price: $35.00	Quantity:

	GTSPEC Rear Differential Mount For 02 - 07 Impreza
	GTSPEC's heavy duty differential mount will strengthen and get rid of your annoying clunking when you shift hard between gears and prevents possible breaks or damage to the rear differential. GTSPEC Part # --- GTS-SUS-1192 ... (read more...)
	Regular Price: $199.00 On Sale For: $179.10	Quantity:

	Kartboy 6-speed Shifter Bushings for 04-07 STi
	Now with FREE SHIPPING! These are a set of Kartboy shifter bushings for the 04-07 STi. The Kartboy Shifter Bushings replace the stock shifter mount bushings in the 2004 Subaru WRX STI. While this product will not change the geometry of the shifting mechanism, it eliminates excessive play in the system for a more solid ge... (read more...)
	Regular Price: $32.00 On Sale Now: $32.00	Quantity:

	Kartboy Rear Differential Bushings for Subaru's
	Now with FREE SHIPPING! These Kartboy Rear Differential Bushings significantly decrease the notorious Subaru rear differential clunk by replacing the factory rubber bushings with polyurethane. These models of bushings are the soft version, allowing less vibration and noise to be transferred to the car in street car applications. Kartboy Part Number: KB-003-DIFF ... (read more...)
	Regular Price: $32.00 On Sale Now: $32.00	Quantity:

	Kartboy Rear Shifter Bushing for Subaru
	Now with FREE SHIPPING! This is the Kartboy Rear Shifter bushing for all manual transmission Subaru's The Kartboy Rear Shifter Bushing replaces the stock shifter mount bushing in 1998-2007 model year manual transmission Subaru vehicles, including the Lega... (read more...)
	Regular Price: $35.00 On Sale For: $35.00	Quantity:

	Kartboy Transmission Crossmember Bushings
	Now with FREE SHIPPING! These Kartboy Transmission Cross Member Bushings replace the soft factory bushings between the Trans Crossmember and the unibody. Fits all Manual Transmission AWD Subaru's including: -- 93 + Impreza -- 91+ Legacy -- Baja -- ... (read more...)
	Regular Price: $30.00 On Sale For: $30.00	Quantity:

	STI Group-N Rear Shifter Bushing / Transmission Mount
	This bushing is designed by STI to improve shifter feel and precision by replacing the soft factory rubber piece with a more solid rubber piece. This bushing attaches at the rear of the shift linkage, and is a perfect ad on if you have all ready replaced the front bushings, and are looking to further improve your shifting feel. (read more...)
	Regular Price: $31.86 On Sale For: $21.24	Quantity:

	STI Hardened Group-N Engine and Transmission Mounts
	These Engine and Transmission mounts are made by Subaru Technica International to replace the stock parts. They are made using stiffer rubber and plastic to reduce movement of the engine and transmission under hard acceleration and braking. These a... (read more...)
	Regular Price: $284.96 On Sale For: $235.00	Quantity:

	Exedy Lightweight Racing Flywheel for 04+ STi
	EXEDY Racing Flywheels are made from solid one piece billet chromoly steel forgings. They are specifically designed to reduce weight and inertia for better engine response. Most incorporate special design features to enhance 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 and have the possibility of separating fr... (read more...)
	Regular Price: $465.81 On Sale For: $322.74	Quantity:

	STI Lightweight Flywheel for STI 6MT
	Subaru Technica International has designed this Lightweight flywheel for the STI. It weights only 7.2 kg or 15.8 lbs. vs. stock flywheel weight of 8.6 kg or 18.9 lbs., and is machined from high strength chromium molybdenum. The reduced rotating mass of the lighter flywheel allows... (read more...)
	Regular Price: $845.00 On Sale For: $792.00	Quantity:

	ACT Heavy Duty Performance Clutch for 2004+ STi
	This is ACT's Heavy Duty Clutch Kit for the 2004 - 2010 STi. This clutch uses ACT's Heavy duty pressure plate in addition to an organic disc to achieve a dramatic increase in clamping force while still staying within the realm of a street application. Complete Kit comes with heavy duty pressure plate, performance organic street disc, release bearing, pilot bearing & alignment tool. Rated to 475 Ft/lbs ... (read more...)
	Price: $734.66	Quantity:

	Exedy STI Hyper Single Clutch
	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 Exedy’s multi-plate clutches, it has a forged aluminum cover that in anodized purple. T... (read more...)
	Regular Price: $1,595.67 On Sale For: $1,088.49	Quantity:

	Exedy- STi Stage 1 Heavy Duty Organic Clutch
	This is a brand new Exedy Stage 1 Organic Heavy Duty Clutch for the 04+ Subaru Impreza WRX STi 2.5L. Thisclutch is the Heavy Duty variant, which increases the wheel torque capabilities to 472, over the standard Stage 1 Organic Clutch's 332. EXEDYorganic racing clutches only use premium friction materials that are resistant to slippage and burst. Increased clamp loads give the necessary capacity to handle modified engines. This is the preferred clutch for s... (read more...)
	Regular Price: $560.00 On Sale For: $512.98	Quantity:

	Exedy-STI Carbon Twin Plate Clutch
	Exedy-STI Carbon Twin Plate Clutch The Flagship Model of Exedy Racing Clutches; the Carbon Steel Multiplate Clutches. The clutches are light in weight, durable and resilient to high heat, contributing to an improvement in track times. Full carbon clutches encompass lightweight, high heat resistance and a stable friction coefficient. Semi carbon clutches incorporate all features ... (read more...)
	Regular Price: $3,349.79 On Sale For: $2,679.80	Quantity:

	Exedy-STI Stage 1 Organic Clutch
	Exedy Racing clutches with organic friction materials use only premium friction materials that are resistant to slippage and burst. Increasing clamp loads give the necessary capacity to handle modified engines. The preferred clutch for street and light horse power track use. The dri... (read more...)
	Regular Price: $645.33 On Sale For: $447.12	Quantity:

	BG Syncro Shift II Manual Transmission Fluid
	BG Syncro Shift II Synthetic Gear Lubricant specifically formulated for modern manual transmissions, transaxles and transfer cases. It provides exceptional thermal stability along with outstanding extreme pressure characteristics, shear stability and low temperature fluidity. BG Syncro Shift II may be effectively used in all vehicles where engine oil, ATF or GL-4 ... (read more...)
	Price: $22.74	Quantity:

	Redline Lightweight Shockproof Gear Oil
	A unique gear oil designed to lubricate racing transmissions and transaxles which see serious loads (not recommended for most syncro-type transmissions). It has excellent low-temperature flow which allows easier shifting when cold. May be used to obtain maximum power transfer in racing differentials which do not see high temperatures. Similar to a 75W140 gear oil, but with the lower internal friction of an SAE 30 motor oil. Used in most road-racing differentials with moderate power and dogring r... (read more...)
	Price: $15.49	Quantity:

	Subaru Rear Differential Breather Plug
	This is the Breather Cap that is on top of most all Subaru Rear Differentials. This will fit all 02+ WRX's, 04+ STI's, 04+ Forester XT's, and 05+ Legacy GT's. The Subaru part # is 38354AA002 Feel free to e-mail us if you are not sure if this is the correct part for your application. ... (read more...)
	Regular Price: $5.31 On Sale For: $4.25	Quantity:

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