The SPEC SS-Trim twin-disc clutch kit with aluminum flywheel is a multi-disc replacement option specified for BMW models including the 2011 1M, 2011–2012 135, and 2011–2017 335. The twin-disc arrangement increases load capacity while the aluminum flywheel reduces rotating mass versus heavier steel units, providing a more responsive feel for drivers who require stronger clutch holding without changing basic vehicle fitment.
Spec 2011 BMW 1M / 11-12 BMW 135 / 11-17 335 SS-Trim Twin Disc Clutch Kit w/ Aluminum Flywheel