Spec 07-10 BMW 335i/135i Stage 3 Clutch Kit *Requires SB53A-2 Flywheel*
The SPEC SB533-2 is the Stage 3 clutch kit for the twin-turbo N54 BMW 335i and 135i with the six-speed manual, built for cars that are being converted from the factory dual-mass flywheel to a SPEC billet flywheel. Buyers who land here usually have a downpipe and tune or bigger turbos, a stock clutch that flares in the upper gears as soon as boost builds, and a plan to launch or run the car at the track where a smooth street disc would overheat.
SPEC builds its stages around the disc. Stage 3 is a six-puck disc: six separate friction pads instead of a full ring of facing, which concentrates clamp load on less area and holds more torque, at the cost of a sharper, more on-off engagement than the full-face Stage 2 and Stage 3+ discs. SPEC rates the SB533-2 at 580 ft-lb and lists the kit weight at 16 lb. The -2 suffix matters on these cars: SPEC lists this kit as non-ratcheting and for its SB53S or SB53A billet flywheels only. Non-ratcheting means there is no self-adjusting mechanism in the pressure plate, so it cannot be set up on the factory dual-mass flywheel. Choose this version only if a billet flywheel is part of the plan, and expect more gear rattle at idle and a busier drive in stop-and-go traffic than with a stock clutch.
A clean full-throttle pull in fourth gear from about 2,500 RPM shows slip: the tach jumps ahead of road speed. Log boost during the pull, since a leaking charge pipe or a wastegate fault on an N54 can feel like lost power without the RPM flare. Our flare vs. slip guide explains what each tach behavior means, and the transmission slipping diagnosis guide covers the broader checks. Bleed the clutch hydraulics before condemning the disc if the complaint is drag or hard shifting rather than slip.
Our listing covers the 2007-2010 BMW 335i and 135i with the N54 and manual gearbox. SPEC splits these cars by production date. Cars built through January 2009 run this kit with the SB53A-2 aluminum or SB53S-2 steel flywheel, and E9x 335i and 135i built from February 2009 require the SB53A-3 or SB53S-3. SPEC's chart also lists the kit for the 2011-2013 335is, the E60 535i, the N54 Z4 35i and the F25 X3, always with a SPEC billet flywheel. Read the build month on the driver door jamb label, or send us year and VIN and we will match the correct flywheel. Other N54 clutch stages are in the rebuild kits category.
If you want a smoother street engagement with the same billet flywheel, compare the full-face SB533F-2 Stage 3+.
| Brand | SPEC |
| Part number | SB533-2 |
| Fits | Spec 07-10 BMW 335i/135i Stage 3 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 SB533-2 as a non-ratcheting kit for its SB53S or SB53A billet flywheels only. Plan to buy the flywheel with the clutch.
SPEC splits by build date. Cars built through January 2009 use the SB53A-2 aluminum or SB53S-2 steel flywheel; E9x 335i and 135i from February 2009 use the SB53A-3 or SB53S-3. Check the door jamb label or send us your VIN.
SPEC lists a torque rating of 580 for the SB533-2. It uses a six-puck Stage 3 disc.
SPEC's Stage 3 uses a six-puck disc that engages more abruptly. Stage 3+ (SB533F-2) uses a full-faced carbon semi-metallic disc that takes up more smoothly on the street.
It can be driven daily, but expect quicker, more on-off engagement and more gear rattle with a single-mass billet flywheel. Cars that rarely launch or see the track are usually happier with a full-face disc.
SPEC also lists the 2011-2013 335is, E60 535i, N54 Z4 35i and F25 X3, each with a SPEC billet flywheel. Confirm with your VIN before ordering.
