SPEC Stage 3 Clutch Kit — E82 135i / E90 335i (2007–2010)

Name: SPEC Stage 3 Clutch Kit — E82 135i / E90 335i (2007–2010)
Brand: KarParts360
SKU: TLX-specSB533-2-CL360A71
Price: 719.1 USD
Availability: InStock

by KarParts360

E82 E88 E90 E92 E93

$719.10

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Key Features

Carbon semi-metallic 6-puck sprung hub disc rated to 580 lb-ft torque capacity
Non-SAC pressure plate increases clamping force and raises RPM ceiling vs. OEM
Double-sprung hub with spring cover relieves and heat-treated components for durability
Fits 2007–2010 E82 135i and E90/E92/E93 335i with N54 turbocharged engine
Requires SPEC SB53A-2 billet flywheel (sold separately) — aluminum 14 lbs or steel 22 lbs
Suited for street, drag, autocross, road racing, rally, and drift applications

Product Details

Brand: KarParts360
Part #: TLX-specSB533-2-CL360A71
Category: Clutch Kits
ASIN: B09RB8FTFT

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SPEC Stage 3 Clutch Kit — E82 135i / E90 335i (2007–2010) — Overview

The SPEC Stage 3 Clutch Kit is engineered specifically for 2007–2010 BMW 135i and 335i owners running N54-powered builds that have pushed well past what the factory clutch was ever designed to handle. At its core is a carbon semi-metallic 6-puck sprung hub disc — SPEC's benchmark design in the puck clutch segment, balancing aggressive engagement character with enough compliance for real-world street use. The 580 lb-ft torque rating gives tuned, bolt-on, or heavily modified N54s a reliable foundation without forcing you to choose between performance and daily drivability.

The pressure plate ditches the OEM self-adjusting (SAC) mechanism entirely in favor of a non-SAC design that delivers higher clamping loads, a lighter rotating assembly, and improved high-RPM behavior. The sprung hub goes further with a double-spring configuration and spring cover relieves for torsional flexibility under load, while heat-treated internal components keep everything intact through repeated hard launches, track sessions, or spirited street driving. This is a purpose-built performance clutch, not a heavy-duty OEM replacement.

One critical installation note: this kit requires the SPEC SB53A-2 billet flywheel, which is sold separately and must be purchased alongside this kit. SPEC offers that flywheel in billet aluminum at 14 lbs or billet steel at 22 lbs, both sharing a low-moment-of-inertia design for quicker revs and infinite rebuildability that makes it a worthwhile long-term investment. Plan the full system together before ordering to avoid any fitment surprises at install time.

Whether your 135i or 335i sees weekend autocross, drag strip duty, road course laps, or just spirited street miles on a tuned map, the SPEC Stage 3 is one of the most proven upgrade paths available for the N54 platform. Part number SB533-2 ships factory sealed and brand new in box.