On several BMWs, rear control arms are a weak point. Turner Motorsport stocks a variety of replacement front control arms for your BMW. We recommend looking into the OE options we offer to save you money on your maintenance so you have more left over for performance parts!
Rubber has no place on a race car (except for tires, of course). Rubber suspension bushings are one of the first things to get swapped out for our race cars. The more solid the better when it comes to controlling the alignment and keeping your race setup consistent. We use as much solid material as the rules allow. With no deflection, solid bushings also give amazing feedback to the driver. For the M235iR, BMW had two specs for the rear control arms - stock stamped steel control arms with a rubber/neoprene bushing that is slightly stiffer than stock (2014-2015 spec) and these aluminum/stainless steel control arms with solid Heim-jointed ends (2016 spec). An additional benefit to the Heim joints is the arms are adjustable so the alignment can be perfectly dialed in. The front control arms use M3/M4 thrust arms and wishbones with sealed monoball joints. Full solid mounts and bushings will give you many setup options with razor sharp steering and chassis response. Note: 2016-spec rear control arms do not have a spring perch like the factory arms. These are for rear coil over shocks only.
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