BC RACING COILOVERS RM SERIES - BMW 3 SERIES E90 05-11 model-BMW 3 SERIES E92 06-11 (AWD) torque is progressively fed in

torque is progressively fed in to help get the power down and get away from the spikey feeling

BMW S55 Major Service Package

Software changes to allow for Catalytic Converter removal

but the HM Series naturally caters to performance-focused builds

start the instructions from here:

BC RACING COILOVERS RM SERIES - BMW 3 SERIES E90 05-11 model-BMW 3 SERIES E92 06-11 (AWD) torque is progressively fed inThe BC Racing RM Series uses inverted monotube dampers on the front, or on both front and rear depending on the application. It offers many of the same features as the BR Series but with the added advantages of an inverted damper design, making the RM Series better suited to fast road and track focused driving. Inverting the damper reduces unsprung weight, improves steering response, and moves critical damper fluid away from brake and hub heat. This