ACT 09-13 BMW 135i / 09-13 335i XACT Flywheel ProMass Performance as both offer full MHD+

as both offer full MHD+ custom code support

and DTM connections for all of the auxiliary inputs and outputs

The extensive adjustment range of the independently configurable rebound and compression make it easy to directly influence the steering behavior

while at high damper speeds

ACT 09-13 BMW 135i / 09-13 335i XACT Flywheel ProMass Performance as both offer full MHD+Noticeably improved engine response and acceleration, OE to mild gear rattle; Heat treated forging for strength and toughness, induction hardened ring gears for maximum life; One piece construction allows less opportunity for failure and provides uniform efficient heat transfer from the clutch disc. No more warped inserts or loose ring gears; Recommended for street and race use; Forged, CNC machined and dynamically computer balanced for smooth high