[Dackelone]

Originally Posted by AndyW

Any reason not to upgrade to the M3/1M rear control arms as well? TRW kit is here: https://www.ecstuning.com/b-trw-part...3322283547kt4/

Edit: Never-mind...just read the awesome stickied thread on the subject...

You can... but you will also need new rear shocks bc on the 1M/M3's the bottom of the shocks mount differently than on a 135i. So new rear shocks are needed.