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Item | Specification |
Product Name | Racing Clutch Kit With Spring Hub |
Engine NO | M50 M52 M54 S54 E34 E36 E39 Z3 E46 |
Describe | Double plates |
Application | BMW 325i 323i |
Quality | High-Quality |
Size | 7.25" 185MM |
Horsepower | 500-700HP |
Matching transmission gearbox | ZF320/ZF GS6 53BZ/5 SPEED /6 SPEED/GS6-37DZ |
This 7.25" twin plate racing clutch kit runs two 185 mm friction discs around a billet floater plate, nearly doubling friction surface versus a single-disc upgrade. Capacity is rated for serious builds, reliably supporting output well past 800 hp on turbocharged M50, M52 and M54 engines. Two plates also share the load, so clamp pressure per disc stays lower and pedal effort remains civilised — strong enough for the track, manageable enough for the street.
Each friction disc uses a spring hub with internal springs that cushion torque spikes before they reach the input shaft. Boosted engines deliver power in violent bursts, and a rigid race disc transmits every one straight into the gearbox, destroying synchromesh and axles. This design absorbs those shocks instead, cutting gear rattle at idle and judder pulling away. That is exactly why a spring hub racing clutch BMW is the right choice for any car that still sees road use.
Holding diameter down to 185 mm keeps rotating mass concentrated near the crankshaft centreline, so the engine gains and sheds revs quickly. Heel-toe downshifts and throttle blips stay crisp and predictable, which is why serious circuit, drift and time-attack builds prefer a compact twin plate over a bulky single disc. You get the responsiveness of a small clutch plus extra capacity, without adding flywheel-effect weight to the rotating assembly.
Each disc is built around a sintered cerametallic friction face developed for competition use. It keeps biting consistently at temperatures that would glaze and slip an organic disc, and delivers predictable, progressive engagement rather than an unpredictable on/off switch. Discs, floater plate and drive components are individually replaceable, so a rebuild costs a fraction of a complete kit. Every unit is dynamically balanced and serialised, with flatness and runout verified before dispatch.
This BMW M50 M52 M54 S54 clutch kit covers both five- and six-speed applications — ZF320 / ZF320Z, GS6-53BZ and GS6-37DZ — across popular E36 325i, 328i and M3 builds plus E34, E39, Z3 and E46 swaps, including M52B20. No machining, no adapter plate, no guesswork.
Boosted M50, M52 and M54 engines deliver torque in violent spikes that a rigid race disc transmits straight into the gearbox. This twin plate racing clutch kit uses spring hub discs whose internal springs cushion those spikes before they reach the input shaft. Capacity still comfortably supports output well past 800 hp, yet low-speed engagement stays smooth enough for daily traffic — serious holding power without the driveline shock that normally destroys synchromesh and axles on a powerful street car.
On a circuit the engine constantly accelerates and decelerates the driveline, and every downshift sends a torsional pulse through the transmission. The spring hub discs in this 185mm billet aluminum clutch absorb those pulses, keeping the gearbox quieter and shift quality consistent deep into a session. Low rotating mass still delivers quick rev-matching, while the billet cover sheds heat efficiently. The car stays predictable and mechanically calm lap after lap, which is what endurance sessions demand.
Drifting is brutal on drivelines: clutch kicks, handbrake transitions and sudden grip recovery all create violent shock loads. The spring hub soaks up that impact instead of passing it to the gearbox, dramatically reducing broken input shafts and worn synchromesh. Cerametallic faces keep biting at high temperature, and because each disc is individually replaceable, a rebuild between events costs a fraction of a complete kit.
Launching hard dumps an enormous instantaneous load into the driveline, and a rigid disc turns that into broken hubs and axles. The spring hub cushions the initial hit, letting the driveline take up smoothly before full clamp load applies — which actually improves launch consistency pass after pass. Capacity remains more than sufficient for aggressive turbo setups, with no slip at the top of the strip.
Swapping an M52B20 or S54 into an E36, E34 or Z3 usually pairs an engine with a gearbox it was never designed to sit behind, and mismatched torsional behaviour causes rattle and premature wear. This BMW M50 M52 M54 S54 clutch kit solves that with spring hub discs that isolate vibration between engine and transmission. It bolts directly to ZF320 / ZF320Z five-speeds and GS6-53BZ / GS6-37DZ six-speeds without machining or adapter plates.
Rigid racing clutches are notorious for gear rattle at idle and judder pulling away from lights. The spring hub design eliminates most of that, so this ZF320Z GS6-53BZ GS6-37DZ twin disc clutch kit stays civilised on the road: quiet at idle, smooth from a standstill, manageable in traffic. Yet it still survives a full day of track sessions without fade. You get genuine competition hardware that does not punish you on the drive home.
Can I take some samples?
Yes, You can first purchase 1 set of tests.
What is the delivery time?
It usually takes 5-7working days for inventory, and 30-45 days forlarge quantities.
What are your payment terms?
We usually accept various payment terms. For example, T/T, L/C, cash.
