Spec 07-09 BMW 135/335/535 Super Twin PT-Trim Semi-Metallic Puck Clutch Kit w/Alum Flywheel
A tuned N54 with upgraded turbos, methanol or E85 will slip the factory clutch quickly, and plenty of single-disc upgrades give up once torque climbs well past stock. SPEC SB53PTA is the Super Twin in P-Trim, a twin semi-metallic puck clutch packaged with an aluminum flywheel, for early N54 manual cars: the 135i, E9x 335i and E60 535i built through January 2009. SPEC rates it at 983 ft-lb, which puts it in big-turbo and drag territory.
The factory setup on these cars is a single-disc clutch on a dual-mass flywheel. The Super Twin replaces both. Two puck-style discs share the clamp load, so the kit holds far more torque than one disc of the same size, and semi-metallic pucks tolerate the heat of repeated launches better than organic facings. The trade-off is a quicker, more on-off engagement than stock and more gear noise at idle once the dual-mass flywheel is gone.
The A in SB53PTA marks the aluminum flywheel version. SPEC lists SB53PTA at 30 lb against 44 lb for the steel-flywheel SB53PT, so this package drops a meaningful amount of rotating weight. The engine revs up and falls off faster between shifts, which helps on track and makes smooth launches take more practice.
Datalog a pull in a high gear and compare engine rpm with vehicle speed; a slipping clutch shows rpm climbing without matching speed. Rule out a leaking slave cylinder or air in the hydraulics, and look for oil on the bellhousing from the rear main or input seal. Our slipping diagnosis guide walks through the checks. If the car is a daily driver at moderate power, a sprung single disc such as the ACT XT Race sprung 6-pad kit or the ACT Mod-Twin HD sprung street may suit you better.
SPEC lists SB53PTA for the BMW 135i built through January 2009, the E9x 335i through January 2009 production, the E60 535i through January 2009 production and the N54 Z4 35i through January 2009. Production date matters here: SPEC sells a separate kit, SB53PT-3A, for 135i, 335i and Z4 cars built from February 2009 on and 535i cars from January 2009, plus the 2011-2013 335is. A 2009 model-year car can fall on either side of that split, so check the production month on the door jamb label, or send us your year and the last 7 of your VIN before ordering. N55 cars are not covered by this kit. Browse more drivetrain parts in our rebuild kits department.
| Brand | SPEC |
| Part number | SB53PTA |
| Fits | Spec 07-09 BMW 135/335/535 Super Twin PT-Trim Semi-Metallic Puck Clutch Kit w/Alum Flywheel |
| Vehicle fitment | BMW 135/335/535 (2007-2009) |
| Type | Clutch Kits - Multi |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Only if it was built through January 2009. SPEC lists a different kit, SB53PT-3A, for cars built from February 2009. Check the production date on the door jamb label or send us the VIN.
No. SPEC lists the 2011-2013 335is under SB53PT-3A, and N55 cars use a different kit.
SPEC rates SB53PTA at 983 ft-lb.
Yes. This is the aluminum flywheel package. SPEC lists it at 30 lb versus 44 lb for the steel-flywheel SB53PT.
It is drivable, but engagement is quicker and noisier than stock and the light flywheel makes launches touchy. Daily drivers at moderate power are usually happier with a sprung single disc.
Replace the pilot bearing and flywheel bolts, check the release bearing and slave cylinder, and fix any rear main or input seal leak while the transmission is out.
