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Sport Compact Clutch Specialists
Subaru WRX & STI Clutch Kits
From stock daily drivers to 800+ HP drag builds, South Bend Clutch offers performance clutch solutions for every WRX and STI. Our clutches are engineered to handle the brutal forces of Subaru's legendary AWD system.
24+
Years in Business
1,000+
HP Capacity Available
100%
Made in USA
12/12K
Warranty Coverage
Performance Clutches for Turbocharged Subarus
The Subaru WRX and STI represent the pinnacle of AWD performance. From rally-inspired handling to impressive straight-line speed, these cars demand clutches that can handle serious abuse.
Whether you're running a bolt-on tune or a full built motor setup, the factory clutch becomes a limitation as power increases. South Bend Clutch offers complete solutions from stock-replacement to full competition.
- Complete coverage for all WRX and STI models
- Clutches rated from 300 to 1,000+ HP
- 240mm applications for all years
- AWD-specific designs
- Complete kits with all hardware
- Built for turbo torque spikes
GC Chassis
First Gen WRX/STI (2002-2007)
The Legend Arrives in America
The WRX finally came to the US market in 2002, bringing the turbocharged EJ205 (227 HP) to American enthusiasts. The STI followed in 2004 with the legendary EJ257 producing 300 horsepower from the factory.
These cars established Subaru's rally heritage reputation in the US market. The 2.5L turbo engines respond incredibly well to modifications—bolt-ons and a tune can push an STI past 400 horsepower.
Transmission Notes
The 5-speed manual in the WRX is the weak point in these cars, often failing at higher power levels. The STI's 6-speed is significantly stronger. Both require upgraded clutches as power increases.
GC Chassis Specifications
- Engine EJ205/EJ257
- WRX HP 227
- STI HP 300
- Transmission 5MT/6MT
- Weight 3,100-3,300 lbs
- Clutch Size 240mm
Hatch Era
GR Chassis WRX/STI (2008-2014)
The Hatchback Years
The GR generation introduced the beloved hatchback body style alongside the sedan. The WRX gained a 265 HP version of the turbo 2.5L, while the STI maintained its 305 HP rating.
These engines are extremely tunable. With supporting modifications, the EJ257 can reliably make 400-500+ horsepower on pump gas. E85 builds regularly exceed 600 horsepower.
Clutch Demands
The aggressive AWD launch capabilities of these cars put tremendous stress on the clutch. Sticky tires and power modifications quickly overwhelm the stock clutch's capacity.
GR Chassis Specifications
- Engine EJ255/EJ257
- WRX HP 265
- STI HP 305
- Transmission 5MT/6MT
- Weight 3,200-3,400 lbs
- Clutch Size 240mm
VA Chassis
VA WRX/STI (2015-2021)
Modern Platform
The VA generation brought updated styling and a new FA20 engine for the WRX (268 HP). The STI retained the proven EJ257 (310 HP). This was the final generation for the beloved EJ engine.
The FA20 responds well to bolt-ons and tuning, with many owners exceeding 350 HP with supporting mods. The STI continues to be a proven platform for 500+ HP builds.
Final EJ Era
The 2021 model year marked the end of the EJ257 era. These STIs are already becoming collectible, especially the limited editions. The platform remains one of the most capable AWD performance cars available.
VA Chassis Specifications
- Engine FA20/EJ257
- WRX HP 268
- STI HP 310
- Transmission 6MT
- Weight 3,300-3,500 lbs
- Clutch Size 240mm
Current Gen
VB WRX (2022+)
New Platform, New Engine
The current WRX features the FA24 2.4L turbo producing 271 horsepower. The controversial styling aside, the new platform offers improved chassis dynamics and a more responsive engine than the previous FA20.
Early tuning results show excellent potential. The larger displacement responds well to boost increases, with modified cars already exceeding 400 horsepower reliably.
No More STI
Subaru discontinued the STI with the new generation, leaving the WRX as the sole performance sedan. This makes proper clutch selection even more important for enthusiasts building power.
VB Chassis Specifications
- Engine FA24
- WRX HP 271
- Transmission 6MT
- Weight 3,400+ lbs
- Clutch Size 240mm
WRX & STI Manual Transmissions
The STI 6-speed is the gold standard for Subaru performance
5-Speed Manual (WRX)
2002-2014
The WRX 5-speed is adequate for stock power but becomes a limitation at higher levels. Many owners upgrade to the STI 6-speed or strengthen the 5-speed internals.
- Clutch Size 240mm
- Torque Rating ~300 lb-ft
- Max HP (realistic) 350-400 HP
- Best For Stock to moderate builds
- Note Weak 5th gear
6-Speed Manual (STI)
2004-Present
The STI 6-speed is a robust transmission that handles impressive power levels. With proper clutch selection and care, it can support 600+ horsepower reliably.
- Clutch Size 240mm
- Torque Rating 400+ lb-ft
- Max HP (w/ SBC) 700+ HP
- Best For All STI builds
- Note DCCD center diff
WRX/STI Clutch Application Guide
Find the right clutch for your Subaru based on model, engine, and power level
| Year Range | Vehicle | Engine | Transmission | Power Level | Recommended Clutch |
|---|---|---|---|---|---|
| 2002-2014 | Subaru WRX | EJ205/EJ255 | 5MT | Stock-350 HP | Stage 2 Daily |
| 2004-2021 | Subaru WRX STI | EJ257 | 6MT | Stock-400 HP | Stage 2 Endurance |
| 2004-2021 | Subaru WRX STI | EJ257 (Built) | 6MT | 400-600 HP | Stage 3 / Dual Disc |
| 2015-2021 | Subaru WRX | FA20 | 6MT | Stock-350 HP | Stage 2 Daily |
| 2022+ | Subaru WRX | FA24 | 6MT | Stock-400 HP | Stage 2 Endurance |
| 2004-2021 | Subaru STI | EJ257 (600+ HP) | 6MT | 600-800 HP | Triple Disc |
Which Clutch Is Right for Your WRX/STI?
Match your clutch to your power level and intended use
Daily Driver
Stage 2 Clutch
Stock to 400 HP
Perfect for bolt-on WRX and STI builds. Handles the aggressive AWD launches while maintaining streetable pedal feel.
- Smooth daily-driver engagement
- Organic friction material
- Handles stage 2 tunes
- Stock flywheel compatible
- Long service life
- Complete kit
Performance
Stage 3 / Dual Disc
350 to 650 HP
For built motor STIs and high-boost WRX builds. Handles the extreme launch loads of AWD performance.
- Ceramic or hybrid friction
- Single or dual disc
- Excellent heat capacity
- Handles big turbo
- Billet flywheel available
- AWD launch ready
Competition
Triple Disc Racing
600 to 1,000+ HP
Maximum capacity for built motor, big turbo STI builds. No-slip guarantee for 9-second passes.
- Ultimate holding power
- Triple friction surfaces
- Full ceramic
- SFI certified
- Drag racing proven
- Custom options available
Why Subaru Owners Choose South Bend
Trusted by enthusiasts and racers
EJ/FA Experts
We've been developing clutches for Subaru's turbo engines for decades. We understand the unique demands of AWD performance.
Made in USA
Every South Bend Clutch is manufactured in Fort Wayne, Indiana with the highest quality materials.
AWD Ready
AWD launches put extreme stress on clutches. Our products are designed for the brutal forces of Subaru's symmetrical AWD system.
Complete Kits
Every kit includes clutch, pressure plate, bearings, and alignment tool. Multi-disc kits include flywheel.
WRX/STI Clutch FAQs
Common questions about Subaru clutches
What clutch for a stage 2 STI?
For a stage 2 STI (intake, downpipe, tune) making 350-380 HP:
- Daily driver priority: Stage 2 clutch with organic friction
- Mixed use: Stage 2 Endurance for track days
- Aggressive driving: Stage 3 for maximum headroom
The stock clutch typically fails around 350 HP on an STI, especially with repeated hard launches.
Why does AWD wear clutches faster?
AWD vehicles put more stress on clutches because:
- All four wheels grip during launches, maximizing load transfer
- No single-wheel spin to relieve driveline stress
- Higher rotational mass from additional drivetrain components
Subaru's AWD system is particularly aggressive. Our clutches are designed specifically for these demands.
Should I upgrade the WRX 5-speed?
The WRX 5-speed has known weaknesses:
- 5th gear: Prone to failure at higher power
- Synchros: Can wear with aggressive shifting
- Torque limit: Generally reliable to ~350 HP
Options include: strengthening the 5-speed, swapping to the STI 6-speed, or keeping power reasonable. A proper clutch upgrade helps protect the transmission.
FA20 vs EJ257 clutch differences?
Both engines use the same 240mm clutch size, but have different characteristics:
- EJ257: Higher torque output, more abrupt boost onset
- FA20: Smoother power delivery, lower peak torque
The EJ257's torque spike is harder on clutches. The FA20 is generally easier on clutches at similar power levels. Both platforms use our standard Subaru clutch kits.
Ready to Upgrade Your Subaru?
Find the perfect clutch or talk to our Subaru experts.
Questions? Email us at sales@southbendclutch.com