BC RACING COILOVERS ZX SERIES - BMW 1 SERIES F20 M140I (14+) (3-BOLT TOP MOUNT) Spring Rates:RECOMMENDED KIT 5.5/9 KG.MM we will send a file

we will send a file back to you

Alfa N tuning on E46 M3s has developed a reputation for being a little jumpy and jerky at lower RPMs and small throttle inputs leading the consensus to be ‘you must have a MAP sensor installed and use MAP-based tuning if you want drivability’

Any other tuning services

improved reliability

BC RACING COILOVERS ZX SERIES - BMW 1 SERIES F20 M140I (14+) (3-BOLT TOP MOUNT) Spring Rates:RECOMMENDED KIT 5.5/9 KG.MM we will send a fileThe BC Racing ZX Series is built specifically for racing and intensive track use, offering a true 3 way adjustable damper system at a level normally seen only in high end motorsport suspension. Each ZX kit provides independent adjustment of low speed compression, high speed compression, and rebound, allowing the chassis to be tuned with exceptional precision for different circuits, surfaces, and driving styles. Unlike the inverted motorsport kits, the