SPEC Single Mass Conversion Clutch Kits BMW E82 135i E90 E92 335i

Product Description

SPEC clutch kits for the (07-up) BMW 135/335 are some of the highest quality performance clutch kits on the market. SPEC makes a high performance clutch option for you; whether your BMW is a bone stock daily driver or a fully modified track beast.

The clutch kits listed on this page are full single mass flywheel conversion kits and are not compatible with the stock dual mass flywheel. All kits require the purchase of SPEC flywheel SB53A-2.

Every SPEC Clutch kit features:
High clamp pressure plate
High torque sprung hub and disc assembly
Bearing and alignement tool kit
COMPATIBLE WITH SPEC 5B53A-2 FLYWHEEL ONLY (SOLD SEPARATELY)

FITMENT:
BMW E82 135 2008-up
BMW E90 E92 335 2007-up

SPEC Stage 1
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 135/335s.

Features:
Torque capacity: 350ft/lbs at the crank
Steel-backed and multi-compound woven organic material
Compatible with SPEC SB53A-2 flywheel only

SPEC Stage 2
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 135/335

Special Notes:
Torque capacity: 405ft/lbs at the crank
Pure Kevlar friction material
Compatible with SPEC SB53A-2 flywheel only

SPEC Stage 2+
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 135/335s that will see some track time.

Features:
Torque capacity: 450ft/lbs at the crank
Hybrid Kevlar and Carbon-Graphite Friction material
Compatible with SPEC SB53A-2 flywheel only

SPEC Stage 3
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 135/335.

Special Notes:
Torque capacity: 508ft/lbs at the crank
Carbon semi-metallic friction material
Compatible with SPEC SB53A-2 flywheel only

SPEC Stage 3+
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 135/335s.

Features:
Torque capacity: 570ft/lbs at the crank
Carbon semi-metallic friction material
Compatible with SPEC SB53A-2 flywheel only

SPEC Stage 4
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 135/335.

Features:
Torque capacity: 508ft/lbs at the crank
Carbon-Graphite Friction Material
Compatible with SPEC SB53A-2 flywheel only

SPEC Stage 5
SPEC's Stage 5 features a full-metallic disc with the highest possible friction coefficient. Not suggested for any 135/335 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: 670ft/lbs at the crank
Full-metallic friction material
Compatible with SPEC SB53A-2 flywheel only