Bilstein B6 Series HD 36mm Monotube Strut Assembly - Lower-Clevis, Upper-Stem, Yellow 2018-bmw-540d-xdrive-esi5335510 The Serrated/Helix combination design also

The Serrated/Helix combination design also reduces intake whistle that occurs with Helix only designs

00 x 16 SS 12pt Bolts (5/pkg)

flow optimization

Coil springs (80 N/mm)

reducing turbulence and improving efficiency

Bilstein B6 Series HD 36mm Monotube Strut Assembly - Lower-Clevis, Upper-Stem, Yellow 2018-bmw-540d-xdrive-esi5335510 The Serrated/Helix combination design alsoBilstein B6 Performance dampers are a performance upgrade to OE dampers designed to be paired with the OE factory spring. 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. B6 Performance dampers will provide improved safety and handling performance with the added benefit of world famous