Spec 12-15 BMW 335i (F30) 3.0L Stage 3+ Clutch Kit
The SPEC SB553F Stage 3+ clutch kit is for the 2012-2015 BMW 335i F30 with the single-turbo N55 3.0L and the six-speed manual. Owners usually come looking for it after a flash tune, intake and downpipe: the factory clutch starts slipping in the upper gears, the revs hang on quick shifts, or the pedal engagement has moved high. This kit raises holding power while staying a single-disc, street-drivable setup. It ships same business day from the USA.
The N55 makes its torque low in the rev range, and a tuned car makes a lot more of it right off boost. That load lands on the clutch disc every time you shift under power. SPEC's Stage 3+ disc uses a carbon semi-metallic, full-faced friction material. Unlike a puck disc, a full face spreads engagement across the whole friction ring, so takeoff stays smooth enough for traffic while the higher friction coefficient keeps the disc locked under boost. SPEC lists SB553F as a ratcheting design for the N55 cars, in line with the self-adjusting factory pressure plate, and its listed weight is 17 lb.
A fourth-gear pull from about 2,500 rpm is the classic test: if the needle jumps without the car pulling harder, the clutch is slipping. Before condemning it, check the clutch hydraulics for leaks or air, confirm the pedal returns fully, and look for oil on the bellhousing seam, which points to a rear main or input seal that would ruin a new disc. Our guide to diagnosing a slipping transmission covers the checks in order, and the rebuild versus replacement cost guide helps when the gearbox itself is in question.
Our listing fits the BMW 335i F30, 2012-2015, N55 engine, manual transmission. SPEC's own application chart for SB553F is broader: it lists the E9x and F30 335 with N55 from 2011, the F32 435i, the F10 535i, the N55 Z4 35i, the 2011-2012 135i, and several other models including the later 340i and M240i. Because this one part number crosses so many chassis, the flywheel pairing differs by car, so send us year and VIN if you are fitting anything other than an F30 335i. The kit is listed for use with the factory dual mass flywheel or a SPEC billet flywheel. Other parts for these cars are in our clutch and rebuild kit category.
For power levels past a single disc, the ACT Mod-Twin 225 for N54/N55 is the twin-disc option.
| Brand | SPEC |
| Part number | SB553F |
| Fits | Spec 12-15 BMW 335i (F30) 3.0L Stage 3+ Clutch Kit |
| Vehicle fitment | BMW 335I (2012-2015); BMW 335I F30 (2012-2015) |
| Type | Clutch Kits - Single |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
SPEC's chart lists SB553F for the 340i as well, but our listing is labeled for the 2012-2015 F30 335i. Send us year and VIN and we will confirm before you order.
No. SB533F is SPEC's Stage 3+ for the N54 135i and 335i. SB553F is the N55 version. Match the engine before ordering.
SPEC lists SB553F for use with the factory dual mass flywheel or a SPEC billet flywheel. Replace the DMF if it is noisy, has excess play or shows heat damage.
SPEC rates Stage 3+ for street, drag and autocross. The full-faced disc engages more progressively than a puck design, though engagement is firmer than a factory clutch.
Inspect the flywheel, pilot bearing and rear main seal while the gearbox is out, and bleed the hydraulics with fresh DOT 4 brake fluid.
