Spec 07-10 BMW 335i/135i Stage 2+ Clutch Kit *Requires SB53A-2 Flywheel*
The SPEC SB533H-2 is a Stage 2+ clutch kit for the twin-turbo N54 BMW 335i and 135i with a manual gearbox, built for owners who have added boost and need more holding power than the factory clutch was designed for. If your 2007-2010 335i or 135i flares in RPM in third or fourth gear under full boost, smells hot after a hard pull, or you are building past stock power and want the clutch done once, this is the version of the SB533H meant for a SPEC billet flywheel conversion.
The clutch is the only mechanical link between the crank and the six-speed input shaft. On a tuned N54 the turbos make torque early and hard, so a worn or stock disc tends to slip right as boost arrives. SPEC's Stage 2+ uses a multi-friction disc that the maker rates 15 to 20 percent above its Stage 2, and SPEC lists the SB533H-2 at 545 ft-lb of torque capacity. The important detail is the -2 suffix: SPEC lists this kit as NON-ratcheting and built only for its billet flywheels. The plain SB533H is the ratcheting version that bolts to the factory dual-mass flywheel. Choose by flywheel plan, not by price.
Separate clutch slip from a boost or traction problem first. Hold a steady third-gear pull from about 2,500 RPM: if the tach rises faster than the speedometer, the clutch is slipping. Log boost at the same time, since a boost leak makes a car feel flat without the RPM flare. Our flare vs. slip guide explains how to read that RPM behavior, and the slipping diagnosis guide covers the general checks. Hydraulic faults, such as a weak slave or air in the line, can also cause drag and hard shifting, so bleed the system before condemning the clutch.
Our listing covers the BMW 335i and 135i from 2007 to 2010 with the N54 engine and manual transmission. SPEC's chart splits the flywheel requirement by build date: cars built through January 2009 use the SB53A-2 aluminum or SB53S-2 steel flywheel, while 135i and E9x 335i built from February 2009 call for the SB53A-3 or SB53S-3. SPEC also lists this kit for the 2011-2013 335is, the E60 535i, the N54 Z4 35i and the F25 X3, each with a SPEC billet flywheel only. Check your production month on the door jamb sticker, and send us year and VIN if you are unsure which flywheel matches your car.
If you are pricing a whole driveline refresh, our manual vs. automatic repair cost guide shows where a clutch job sits against other repairs.
| Brand | SPEC |
| Part number | SB533H-2 |
| Fits | Spec 07-10 BMW 335i/135i Stage 2+ Clutch Kit *Requires SB53A-2 Flywheel* |
| Vehicle fitment | BMW 335I/135I (2007-2010) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. SPEC lists the SB533H-2 as a non-ratcheting kit for its billet flywheels only. If you want to keep the factory dual-mass flywheel, the plain SB533H (ratcheting) is the version built for it.
SPEC splits it by build date. 135i and E9x 335i built through January 2009 use the SB53A-2 aluminum or SB53S-2 steel flywheel. Cars built from February 2009 call for the SB53A-3 or SB53S-3. Check the production month on the driver door jamb sticker.
SPEC rates the SB533H-2 at 545 ft-lb. Stage 2+ is the step above SPEC's Stage 2 Kevlar disc and below the Stage 3+ full-face carbon semi-metallic disc.
SPEC's chart also lists the 2011-2013 335is, the E60 535i, the N54 Z4 35i and the F25 X3, each with a SPEC billet flywheel only. Send us year and VIN to confirm before ordering.
On these BMWs the clutch slave is fed from the brake fluid reservoir. Bleed it with fresh brake fluid of the grade printed on the reservoir cap after the transmission goes back in.
Yes. Drive normally with gentle engagements for the first few hundred miles and avoid full-boost launches until the disc has bedded in evenly against the new flywheel.
