BC RACING COILOVERS RM SERIES - BMW 3 SERIES E90 05-11 model-BMW 3 SERIES E92 06-11 (AWD) but the HM Series naturally

but the HM Series naturally caters to performance-focused builds

All shiftmaps have been recalibrated to create a way more lively driving experience than before

start the instructions from here:

Software changes to allow for Catalytic Converter removal

BC RACING COILOVERS RM SERIES - BMW 3 SERIES E90 05-11 model-BMW 3 SERIES E92 06-11 (AWD) but the HM Series naturallyThe 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