[z3papa]

Seats are not comfort and convenience. If they were part of the ZCP package which puts the car in AS along with coilover suspension and whatever other bits, you'd need to have all those bits included. Cat back exhaust does not put you out of BS/AS. For a real run at STU, you'd have to put your car on a serious diet. I personally think a M2 can be competitive in BS even with limited camber, and with higher COG. Those folks looking solely at hp and weight really aren't getting it. The SAC looks at width, length, suspension, and consider real world limitations or benefits such as gearing, ability to overcome nannies etc.