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SPEC Clutch Kits STI

SPEC Clutch

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Product Options

  • SPEC Stage 1 Clutch Kit STI (2004-2018)

    SKU: SU301

    Price: $633.60

  • SPEC Stage 2 Clutch Kit STI (2004-2018)

    SKU: SU302

    Price: $683.10

  • SPEC Stage 2+ Clutch Kit STI (2004-2018)

    SKU: SU303H

    Price: $719.10

  • SPEC Stage 3 Clutch Kit STI (2004-2018)

    SKU: SU303

    Price: $683.10

  • SPEC Stage 3+ Clutch Kit STI (2004-2018)

    SKU: SU303F

    Price: $809.10

  • SPEC Stage 4 Clutch Kit STI (2004-2018)

    SKU: SU304

    Price: $704.70

  • SPEC Stage 5 Clutch Kit STI (2004-2018)

    SKU: SU305

    Price: $719.10


Product Description

SPEC clutch kits for the Subaru STI are some of the highest quality performance clutch kits on the market. SPEC makes a high performance clutch option for you; whether your STI is a bone stock daily driver or a fully modified track beast.

Every SPEC Clutch Kit Includes:
High clamp pressure plate
High torque hub and disc assembly
Replacement bearings
Alignment tool


SPEC Stage 1 for the Subaru STI: Stage 1 features an integrally molded carbon Kevlar-based, high performance organic lining that offers smooth engagement and excellent life. This lining has an integrally bonded steel backing for strength under high clamp loads and temperatures. The hub is double sprung with spring cover relieves for flexibility and heat treated components for strength and durability. Stage 1 is suggested for OEM replacement, daily driven or lightly modified STI.

Features:
Torque capacity: 355ft/lbs
Steel-backed and multi-compound woven organic material


SPEC Stage 2 for the Subaru STI: Stage 2 features a pure Kevlar disc with steel backing. This lining features excellent drivability like the Stage 1, but offers slightly longer life and higher torque capacity. The hub is double sprung with spring cover relieves for flexibility and heat treated components for strength and durability. Best for moderately modified or daily driven STI.

Features:
Torque capacity: 414ft/lbs
Kevlar disc with steel backing


SPEC Stage 2+ for the Subaru STI:
SPEC's Stage 2+ features a multi-friction disc in a full faced configuration with carbon semi-metallic on one side and Kevlar on the other. The 2+ offers the drivability and engagement quality of Stage 2, but with a 15-20% higher torque capacity. The hub is double sprung with spring cover relieves for flexibility and heat treated components for strength and durability. Stage 2+ is suggested for highly modified but daily driven STIs that will see some track time.

Features:
Torque capacity: 465ft/lbs
Carbon semi-metallic/ Kevlar disc


SPEC Stage 3 for the Subaru STI: The SPEC Stage 3 clutch kit features a carbon semi-metallic 6-puck sprung hub disc that has been the leading pucked clutch in drivability, life & torque capacity. Stage 3 is designed for street & race cars that require an aggressive but streetable engagement & high torque capacity. The hub is double sprung with spring cover relieves for flexibility & heat treated for strength and durability. Suggested for highly modified, street, autocross & track driven STI.

Features:
Torque capacity: 525ft/lbs
Carbon semi-metallic 6-puck sprung disc


SPEC Stage 3+ for the Subaru STI: Stage 3+ is the flagship stage for a high powered street or race car that requires a manageable and friendly engagement. The SPEC Stage 3+ features a carbon semi-metallic full faced material that offers unparalleled life, friction coefficient and drivability characteristics in one single package. The hub is double sprung with spring cover relieves for flexibility and heat treated components for strength and durability. Suggested for very highly modified, streetable autocross & track driven STIs.

Features:
Torque capacity: 585ft/lbs
Carbon semi-metallic full face disc


SPEC Stage 4 for the Subaru STI: The SPEC Stage 4 is a solid hub version of the Stage 3. The hub is solid 8-rivet and the assembly is heat treated for strength and durability. It is available in 6-puck for the smooth engagement. The Stage 4 is street drivable but not street friendly due to the rigid hub. Best for dedicated drag racing, road racing, rally or drift cars. Not suggested for any street driven STI.

Features:
Torque capacity: 525ft/lbs
6-Puck solid friction disc


SPEC Stage 5 for the Subaru STI: SPEC's Stage 5 features a full-metallic disc with the highest possible friction coefficient. Not suggested for any STI that gets used on the street. The SPEC Stage 5 has a solid 12-rivet hub and the assembly is heat treated for strength and durability. Best for extreme street and drag racing. Not for street use. Very harsh engagement and lots of noise/chatter.

Features:
Torque capacity: 697ft/lbs
Solid 12-rivet hub, 6-puck

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