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6 SX are precision-built in-house
6 FSi from ch 8Z-1-03C61 001 (2002-2005) are precision-built in-house
Custom HEL anodised aluminium bracket
Excellent synchronous behavior
G21 3-Series Touring (330i
BC RACING COILOVERS ER SERIES - BMW 3 SERIES E90 05-11 (TRUE REAR COILOVER) Spring Rates:RECOMMENDED KIT 5.5/6 KG.MM 6 SX are precision-built in-houseThe BC Racing ER Series is a high performance coilover system featuring external reservoirs and completely separate compression and rebound damping adjustment. It builds on the proven quality of the BR and DS Series but adds far greater tuning control, making the ER Series ideal for drivers who want more precise handling balance on fast road cars and track focused builds. Key Features Digressive piston and damping curve External reservoirs with 30