Bilstein B8 2001 BMW 525i Base Sedan Rear 46mm Monotube Shock Absorber Fuel Delivery>Fuel Pressure Regulators 5" 409 stainless steel constant-diameter

5" 409 stainless steel constant-diameter DPF-back system with negative backpressure SideKick tip

View the 21-772C vehicle applications to determine the legal status for each vehicle

The 21-821DS Performance Cold Air Intake System produces horsepower and torque gains by replacing the restrictive air filter and air intake housing

As with all BBK Performance exhaust headers they feature a 3/8" laser cut flange for additional strength and a guaranteed leak free fit

Protects durability by eliminating safe-EGT-level guesswork

Bilstein B8 2001 BMW 525i Base Sedan Rear 46mm Monotube Shock Absorber Fuel Delivery>Fuel Pressure Regulators 5" 409 stainless steel constant-diameterBilstein B8 Performance Plus dampers are a performance upgrade to OE dampers designed to be paired with aftermarket lowering springs. These dampers offer application specific valve settings with a monotube design to bring out the best handling performance of a vehicle. Each damper is rigorously tested for quality that meets or exceeds OE standards. B8 Performance Plus dampers are the ideal solution for pairing with a lowering spring for improved