BILSTEIN 19-317410 Shock Absorber B4 (R1) BMW 1 F40 mit M-Fahrwerk;H ymm_32 Carbon fiber parts are hand-laid

Carbon fiber parts are hand-laid

The transmission cooler is a heavy-duty high-performance 5 plate design that connects to the OEM hoses

No modification to the gear shaft is required allowing this upgrade to be fully reversible

we added a second inlet to the airbox with a scoop pulling in air from the inner wing area

BILSTEIN 19-317410 Shock Absorber B4 (R1) BMW 1 F40 mit M-Fahrwerk;H ymm_32 Carbon fiber parts are hand-laidDescription BILSTEIN 19 317410 Rear Shock Absorber B4 OE Replacement The Bilstein B4 is designed as an ideal OE replacement shock absorber. Its specifications and function match the original equipment, and it is manufactured to the same quality standards as OE, making it suitable for reliable replacement of the original shock absorber. The Bilstein B4 restores the vehicles original handling characteristics, providing a driving experience similar to