Spec Stage 5 Clutch Kit Non-SAC SB535-2 – BMW 135i / 335i (N54)

OVERVIEW

The SPEC Stage 5 clutch kit uses a full-metallic disc with the highest friction co-efficient SPEC offers. It is street drivable but not street friendly. The hub is solid 12-rivet and the assembly is heat treated for strength and durability. SPEC recommends it for extreme street and drag racing use.

This is the non-SAC version, built to run on a single mass flywheel and not compatible with the OEM dual mass flywheel. SPEC notes that a single mass flywheel is generally only needed on cars making in excess of 500 WHP / 500 lb-ft. SPEC clutches and flywheels are manufactured on-site using advanced methods under strict tolerances.

SPECS

• Stage 5 single disc clutch kit
• Torque capacity: 820 ft-lbs
• Friction material: full-metallic, highest friction co-efficient in the SPEC range
• Hub: solid 12-rivet, heat treated
• Pressure plate: SPEC high-clamp
• Character: street drivable but not street friendly; SPEC lists extreme street and drag racing
• Flywheel requirement: single mass flywheel required — not compatible with the OEM dual mass flywheel
• Built to order — ships in 1–2 weeks on average

PARTS INCLUDED

• Pressure plate
• Clutch disc
• Pilot bearing
• Release (throwout) bearing
• Alignment tool
• SPEC clutch kits supplied for use with a SPEC flywheel include pressure plate, disc, pilot bearing, release bearing and alignment tool.
• When a SPEC flywheel is ordered it ships with pressure-plate-to-flywheel bolts.

TECH RESOURCES

Additional Parts Required

• SPEC single mass flywheel — REQUIRED. Choose by production date: SPEC 8-bolt steel SMFW SB53S-2 (2007 – 1/2009), SPEC 8-bolt aluminum SMFW SB53A-2 (2007 – 1/2009), SPEC 6-bolt steel SMFW SB53S-3 (2/2009 on) or SPEC 6-bolt aluminum SMFW SB53A-3 (2/2009 on).
• Pilot bearing, release bearing and alignment tool are included in the kit.
• Installer-supplied: transmission jack, new flywheel-to-crank bolts and BMW-specification transmission oil if the transmission is drained.
• When switching to a single mass flywheel some flywheel chatter or rattle is to be expected.

Installation

• SPEC does not publish a downloadable installation PDF for this application — follow the printed installation and break-in instructions supplied with the kit.
• Installation requires removal of the transmission and should be carried out by a qualified technician. Inspect the pilot bearing bore, clutch fork, release-bearing guide sleeve and slave cylinder while the transmission is out.
• Bed the clutch in with light, gradual engagements before applying full load.

Notes

• Flywheel bolt pattern changes with production date — 8-bolt through 1/2009 and 6-bolt from 2/2009. Confirm your production date with Speed Logic before ordering.

PART NUMBER

• Clutch kit: SB535-2
• SPEC flywheel, 8-bolt (2007 – 1/2009 production): SB53S-2 steel or SB53A-2 aluminum
• SPEC flywheel, 6-bolt (2/2009 production on): SB53S-3 steel or SB53A-3 aluminum

VEHICLE APPLICATIONS