I have an R53 with I use mostly for autocross and track use. I have already installed an M7 Strut Tower Brace and am considering their Under Strut System and Rear Chassis Brace.

Does anyone have experience with these and what is your feedback?

Thanks,

Deven

 

i have a similar setup from another guy who makes mini stuff.

i personally like it (front brace setup anyway). the one that goes across the LCA bushings and connects under the cat area of the exhaust. really stiffened up the car!

fwiw, here is his stuff, its cheaper than M7, and ive had my system for a couple of years now with no issues.

http://www.ebay.com/itm/Mini-Cooper-...:SEMK:US:SHOWI

 

Yes Undermount braces work. It makes the car going in and out of corners even more predictable. Definitely get it. I will get be adding the rear strut tower brace soon as well.
The price of the kit astroBlackMetallic_Mini mentioned is really reasonable.
Also add a skid plate in the front as well. It aids on keeping the front end down during high speeds. Mine was from Rennline in Vermont.