Type RN Series coilover.
This is the kit we recommend for the best balance of performance and comfort, designed by the factory to have the best overall compromise of spring rate, ride height range, top mount design and damping rate to suit the majority of car owners.
It is more than capable of dealing with fast road and track work but also retains a high degree ride civility so the car can still be used for mundane duties and long journeys without the ride becoming tiring.
The RN series coilover kits are supplied without front top mounts and with aluminium rear top mounts with rubber centre or no rear top mounts.
You may also wish to add the BC Rear Extender - Which allows you to adjust the coilover setting without removing all the parts.
This is the 5-bolt version BR Series coilovers. For the 3-bolt version please see BC Racing BMW F30 xDrive BR Series Coilover Type RA - 5 Bolt (Inc. 318dx, 330ix, 335ix & 340ix).