BMW I-84 4 Series (5-Bolt Top Mounts) 2015-2020 ER Coilover I-49 while higher spring rates feel

while higher spring rates feel much smoother

Manual Control Mode for each bag (individually or combined)

Modular Upgradeable to 2-way or 3-way Canister

M ller products are proudly built in the USA to the highest standards

The Best Bang for your buck

BMW I-84 4 Series (5-Bolt Top Mounts) 2015-2020 ER Coilover I-49 while higher spring rates feelThe BC Racing ER Series Coilover System is the next evolution in your suspension tuning and vehicle setup needs. The ER Series offers 30 clicks of independently adjustable compression and rebound with remote reservoirs to increase oil capacity and help with faster heat dissipation. Each ER Series Coilover System undergoes the same rigorous testing and development as the coilover series that precede it, with the addition of more extensive real world