SPEC part number SB532-2 is the Stage 2 clutch for BMW's N54 3.0L twin-turbo six. SPEC builds Stage 2 around a Kevlar disc with a steel backing, a combination the company describes as yielding excellent drivability, longer life and higher torque capacity than its organic Stage 1 disc, and rates this kit at 485 lb-ft.
The thing that separates SB532-2 from every other SPEC N54 kit is the cover, not the disc. SB532-2 is SPEC's non-ratcheting assembly, which cannot be run on the factory dual-mass flywheel: SPEC lists it strictly for use with one of their billet single-mass flywheels. Through January 2009 production that is the SB53S-2 or SB53A-2; from February 2009 production onward it is the SB53S-3 or SB53A-3. That flywheel is a separate part and is not in this box. If you intend to keep the OE dual-mass flywheel, SPEC's ratcheting Stage 2+ kit, SB533H, is the part number to order instead. Torque capacity rated by SPEC at 485 lb-ft. Non-ratcheting pressure plate, will not run on the OE dual-mass flywheel. Flywheel required and NOT included: SPEC SB53S-2 or SB53A-2 (production through January 2009), or SB53S-3 or SB53A-3 (from February 2009). SPEC application coverage for this part number spans BMW 135, 335 (E9x), 335is, 535 (E60), X3 (F25) and Z4 35i. SPEC rates Stage 2 for street, drag, pulling and autocross use. Sibling part: SB533H is the Stage 2+ multi-friction version that keeps the OE dual-mass flywheel.
Specifications
| Stage |
Stage 2 |
| Disc Material |
Kevlar with steel backing |
| Torque Capacity |
485 lb-ft |
| Flywheel Required |
Yes — SPEC billet single-mass flywheel, not included (SB53S-2 / SB53A-2 through Jan 2009 production; SB53S-3 / SB53A-3 from Feb 2009) |
| Street/Strip Use |
Street, drag, pulling, autocross |
| Part Number |
SB532-2 |
This part fits:
| Year |
Make |
Model |
Submodel |
| 2008-2009 |
BMW |
135i |
Base |
| 2007-2009 |
BMW |
335i |
Base |
| 2009 |
BMW |
335i xDrive |
Base |
| 2007-2008 |
BMW |
335xi |
Base |
| 2008-2009 |
BMW |
535i |
Base |
| 2009 |
BMW |
535i xDrive |
Base |
| 2008 |
BMW |
535xi |
Base |