[CSBM5]

I think with the right setup and driver, it can definitely get it done in F-street. If you start off with the ZCP package, you get 9/10" wheels instead of 8.5/9.5", and now that you can change diameters legally, you'd be set to run 9x18 and 10x18 with either 275 square or 275/295 Rivals perhaps.

I would guess that to truly be at the top of the game, you'd need to swap out the ZCP EDC shocks for some trick stuff like Rich has done on his car. He'd be the one to comment on that, especially if his car originally came with EDC. Mine is still on its stock shocks (non-EDC).

You want to look for a car without sunroof, fold-down seats, and DCT mainly since all those together add up to well over 100lbs of dead weight (I realize you already know this part). It's easier to find E92s without sunroofs; for 2011 E90s with 6MT, I think something like only 180 were imported, so an E90 hunt will be harder.

You know the big question is "what happens in 2015?" If the new Mustang gets classed into F-street, and the F80/82 M3/M4 gets classed into F-street (mostly likely they would be if the 'stang is being let in), then that's a whole new house of cards. The F80 will be ~150lbs or more lighter (although larger, longer, wider) and will have a kick-ass power curve with huge area under the curve. Similarly the new Mustang is bringing in a whole new set of tools to the game too. That is probably the biggest wild card in the E9x plan imo?

Regards,
Chuck

P.S. It looks like you're doing superb in overall PAX competition in your region with the M5! Congrats! How are the 275 Rivals doing squeezed onto the 8" wheels?