Bilstein B3 Rear Coil Spring (40-303567) - BMW E61 Sport/MAM R1 Durability & Fit: OE-quality fitment

Durability & Fit: OE-quality fitment with robust internals designed to handle aggressive driving and lowered stance

OEM-Level Quality: Built to the same standards as factory-fitted compressors

Engineered specifically for the Porsche 911 RSR (160 161)

Proven Technology: Built on Bilstein’s monotube gas pressure technology with Eibach’s world-renowned spring design

Ideal when replacing shocks or struts

Bilstein B3 Rear Coil Spring (40-303567) - BMW E61 Sport/MAM R1 Durability & Fit: OE-quality fitmentIf you're looking for quality, look no further. By choosing BILSTEIN springs, you're backing an uncontested champion: a successful motor sports fitter and a leading original equipment manufacturer of automotive springs. The benefits of BILSTEIN B3 shock absorbers are: Innovative technical designs, such as Pigtail ends, Minibloc forms and central force design High quality chrome vanadium or chrome silicone steel for an extremely high level of break