Originally Posted by Sales@JDP
Neither. IMO, the chassis braces are somewhat of a bandaid. Doing a set of solid subframe/cradle bushings will be much more beneficial for eliminating cradle movement.
I definitely agree with Tyler, you will see very minimal improvement in eliminating rear cradle movement with the chassis braces/stiffeners. Really the only way to control/eliminate the rear cradle movement is with rear cradle inserts or full bushings replacements. We have a couple different offerings depending on your power level and goals with your car. Here is what we offer here at BMR:
BMR rear cradle insert (BK040)
BMR full poly-urethane rear cradle bushings (BK024)
BMR solid delrin rear cradle bushings (BK027)