The OEM design billet aluminium flywheel weighs 15 lbs, and the billet steel 25 lbs. Come with the spigot bearing and dowels.
For even higher performance levels and more linear pedal feel (our non-SAC Cup kit with flywheel), we will recommend the SPEC design flywheel.
This is to be installed with SPEC BMW N55 B58 E82 E90 E92 F30 F32 OEM-Design Clutches (1M, 135i, M235i, M240i, 320ix, 328d/ix, 335i, 340i, 428ix, 435i, 440i, 535i & Z4 35i)
Please Note: This SPEC designed flywheel is to be used with an OEM Clutch or OEM style clutch.
Steel or Aluminium?
The aluminium produced one of the highest wheel hp gains we have ever seen, 17 whp (on an otherwise unmodified car).
The steel produced around 10 whp. The steel dampens more of the gear resonance and, thus, is quieter at idle with the pedal out than the aluminium.