ACT 09-13 BMW 135i / 09-13 335i XACT Flywheel ProMass NO-DISCOUNT 8L (4G93) Stage 4 Clutch

8L (4G93) Stage 4 Clutch Kit (1MD)

BORLA(r)'S Polyphonic Harmonizer Technology utilizes patented units that contain pipes of different diameters and lengths to create multiple exhaust notes that harmonize to deliver a clean

Manufacturer Part # : 15280110

It is a huge upgrade for intake noise and provides a nice throaty intake tone

ACT 09-13 BMW 135i / 09-13 335i XACT Flywheel ProMass NO-DISCOUNT 8L (4G93) Stage 4 ClutchManufacturer Part # : 601030 Associated Comments 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