ACT 09-13 BMW 135i / 09-13 335i XACT Flywheel ProMass Performance That's why our test engineers

That's why our test engineers evaluate the setups on numerous highways and country roads with various road surface types

and DTM connections for all of the auxiliary inputs and outputs

and driving style

while at high damper speeds

as both offer full MHD+ custom code support

ACT 09-13 BMW 135i / 09-13 335i XACT Flywheel ProMass Performance That's why our test engineersNoticeably 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