Bilstein B3 98-06 BMW 3 Series Replacement Rear Coil Spring Suspension>Camber Kits The unique air filter-to-housing interface

The unique air filter-to-housing interface (patent pending) allows for maximum filter size which increases the available air volume while simplifying the installation process

No need to spend an arm and a leg

Serrated/Helix Design: The Serrated/Helix design creates air turbulence in the intake manifold

aluminum end caps and locking rings

A supplied gasket provides a perfect seal

Bilstein B3 98-06 BMW 3 Series Replacement Rear Coil Spring Suspension>Camber Kits The unique air filter-to-housing interfaceBilstein B3 OE Replacement coil springs are designed to replace your vehicle's original springs. These coil springs are manufactured to meet all the OE dimensions, spring rates, and design types (such as miniblock or central force design). With Bilstein B3 OE Replacement coil springs, you are restoring your vehicle's suspension system function and safety to factory specifications.