SPEC Clutch SB031 Stage 1 Performance Clutch Kit for 1999-2005 BMW 3/5-Series

Vehicle Fitment

• 1999-2000 BMW 328i (E46, 5-spd) - with OE dual-mass flywheel
• 2001-2005 BMW 330i / 330Ci (E46, 5-spd) - with OE dual-mass flywheel
• 1999-2000 BMW 528i (E39, 5-spd) - with OE dual-mass flywheel
• 2001-2003 BMW 530i (E39/E46, 5-spd) - with OE dual-mass flywheel
• 1998-2000 BMW Z3 2.8L (from Oct 1998) - with OE dual-mass flywheel
• 2001-2002 BMW Z3 3.0L - with OE dual-mass flywheel
• 2004-2006 BMW X3 (E83) - with OE dual-mass flywheel

Features

• Stage 1 performance clutch kit, street and light track capable
• Hybrid carbon-Kevlar/organic friction disc offers smooth engagement with increased torque capacity
• Heavy-duty pressure plate designed for higher clamp load vs stock
• Includes billet non-SAC (self-adjusting clutch) design, eliminating SAC mechanism issues
• Compatible with OE dual-mass flywheel or upgraded single-mass flywheel options
• Rated to 430 ft-lbs torque capacity to handle upgraded naturally aspirated engines and mild forced induction use cases :contentReference[oaicite:1]{index=1}
• Designed for high heat and repeated clutch engagements in aggressive driving (autocross, drifting, trackwork) :contentReference[oaicite:2]{index=2}
• Maintains good drivability and pedal feel for street use - a strong "Stage 1" upgrade without full race harshness

Specifications

• Torque capacity: 430 ft-lbs (approx. 583 Nm) :contentReference[oaicite:3]{index=3}
• Clutch disc type: carbon-Kevlar backed organic composite
• Pressure plate: heavy-duty billet non-SAC design
• Flywheel compatibility: works with OE dual-mass flywheel or optional single-mass steel/aluminium flywheel :contentReference[oaicite:4]{index=4}
• Kit weight: approximately 15 lbs (≈6.8 kg) :contentReference[oaicite:5]{index=5}
• Transmission fitment: 5-speed manual transmissions only (per manufacturer listing) :contentReference[oaicite:6]{index=6}
• Drivetrain: Rear-wheel drive vehicles (BMW 3 & 5 Series, Z3, X3) only

Included Components

• 1x carbon-Kevlar/organic clutch disc
• 1x heavy-duty pressure plate (billet non-SAC)
• 1x heavy-duty throw-out bearing (release bearing)

Product Description

The SPEC Clutch SB031 Stage 1 Performance Clutch Kit is engineered for owners of BMW 3-Series (E46) and 5-Series (E39/E46) models, as well as Z3 and early X3 models running 5-speed manual transmissions. It is designed to replace the weak link of the factory clutch when equipped with upgrades, aggressive driving or track use. The kit brings a significant boost in torque capacity (430 ft-lbs) while maintaining strong drivability for street cars.

This clutch kit uses a hybrid carbon-Kevlar/organic disc paired with a billet non-SAC pressure plate, offering a step up from the factory clutch in both clamp load and durability, yet avoids the harsh engagement of full race units. It is compatible with the OE dual-mass flywheel for daily use or may be paired with an optional single-mass flywheel for further performance gains.

Ideal for performance-minded enthusiasts who drive their BMWs hard - from spirited street/commute to autocross or occasional track sessions - the SB031 ensures your clutch will no longer be the weak point. It is **not universal**; installation must be on a 5-speed manual model with the listed fitment cars only. For vehicles with 6-speed manual or automatic transmissions, this kit is **not applicable**. Fitment in 2006+ or other chassis is **unconfirmed** at time of listing; coverage confirmed through **2006** only as per manufacturer.