Spec 07-10 BMW 335i/135i Stage 3+ Clutch Kit
The SPEC SB533F Stage 3+ clutch kit is built for the twin-turbo N54 cars: the 2007-2010 BMW 335i and the 135i. If your manual car now slips in third or fourth when the turbos come on, flares the revs on a hard shift, or the factory clutch simply gave up after a tune and downpipes, this is the single-disc upgrade that keeps a normal pedal and fits the stock bellhousing. It ships same business day from the USA.
The clutch is the only thing coupling the crank to the gearbox. When boost is raised, the factory organic disc and pressure plate run out of clamp and friction before the engine runs out of torque, and the result is slip, heat and a glazed disc. SPEC describes its Stage 3+ disc as a carbon semi-metallic, full-faced material. Full-faced matters on a street car: compared with SPEC's 6-puck Stage 3, the full face gives smoother takeoff and a more forgiving engagement while still raising the friction coefficient over stock. SPEC lists this kit as a ratcheting pressure plate design for these BMW chassis, matching the self-adjusting style of the factory unit, and lists its shipping weight at 17 lb.
If your car is mostly a daily driver with mild power, compare the SPEC SB533H Stage 2+ kit for the same cars. Stage 3+ is the step for heavier tunes, track days and drag launches.
Do a simple load test: in fourth gear at about 2,500 rpm, go to full throttle and watch the tach. If engine speed jumps ahead of road speed, the clutch is slipping. Rule out a leaking slave cylinder or air in the hydraulic line first, since a sticking release can mimic a worn disc, and check for oil on the bellhousing from a rear main seal, which contaminates any new disc. Our transmission slipping diagnosis guide walks through separating clutch slip from other driveline faults. If you are weighing repair costs, our manual vs automatic repair cost breakdown is a useful reference.
This listing covers the BMW 335i and 135i with the N54 engine and the six-speed manual, 2007-2010. SPEC also lists SB533F for the 2011-2013 335is, the E60 535i and the N54 Z4 sDrive35i. One detail matters: SPEC splits these cars at the January/February 2009 production break. The clutch is the same part number on both sides of that line, but earlier cars pair with SPEC's SB53A or SB53S billet flywheel while later cars use the SB53A-4 or SB53S-4. If you are keeping the factory dual mass flywheel, the clutch bolts up either way. Send us your year and VIN if you want us to confirm before ordering. More parts for these cars are in the clutch and rebuild kit category.
If you plan to push past what a single disc can hold, the ACT Mod-Twin for N54/N55 is the twin-disc route.
| Brand | SPEC |
| Part number | SB533F |
| Fits | Spec 07-10 BMW 335i/135i Stage 3+ Clutch Kit |
| 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 |
Yes, SPEC lists SB533F for E9x 335i built both before and after the February 2009 production change. What changes is the matching SPEC billet flywheel: SB53A/SB53S for earlier builds, SB53A-4/SB53S-4 for later builds. With the factory dual mass flywheel it fits either way.
SPEC lists this kit for use with the OE dual mass flywheel or a SPEC billet flywheel. Reuse the DMF only if it has no excess rocking, noise or heat damage; if it is worn, replace it at the same time.
SPEC rates Stage 3+ for street, drag and autocross use. The full-faced carbon semi-metallic disc engages more smoothly than SPEC's puck-style Stage 3. Expect a slightly firmer feel than stock. If the car is mostly a commuter, the SB533H Stage 2+ is the gentler option.
BMW clutch hydraulics share the brake fluid reservoir and use DOT 4 brake fluid. Bleed the slave cylinder after the gearbox is reinstalled.
SPEC lists SB533F for the 2011-2013 335is and the 2007-2010 E60 535i as well. Our listing is labeled for the 335i and 135i, so send year and VIN if you want us to confirm for another chassis.
