SPL Parts SOLID Differential Bushings (SPL SDBS Z33) _66.1_/_71.5 The Active Autowerke Exhaust Valve

The Active Autowerke Exhaust Valve Extension Cable is designed for select BMW models where stock valve cables are insufficiently long to accommodate rear exhaust system upgrades

Fits OEM Drive Pulley and APR Crank Pulley

Enhances Aerodynamics

For EFI applications use regulator P/N 13134 or P/N 13110

0”diameter anglecut

SPL Parts SOLID Differential Bushings (SPL SDBS Z33) _66.1_/_71.5 The Active Autowerke Exhaust ValveSPL Parts SOLID Differential Mounting Bushings (SDBS) eliminate the stock mushy rubber bushings to hold the differential solidly to the subframe. The stock silicone filled differential bushing is notorious for tearing under hard driving (characterized by black streaks on the rear subframe from dried silicone leaked from the bushing). Our bushings will never break, and will keep the differential from "bouncing around" under hard launches acceleration.