What parts would that interfere with? Besides, the wheelbase is the exact same, it's the same frame, chassis, and suspension. The Redline has a 103.5" wheelbase to the Cobalt's 103.3" wheelbase. .2" isn't a difference that is going to bother anything. There are plenty of people that are going to make parts for the car, there was alot more in Barry's email than just that statement. Not to mention I've never bought anything from RKsport to begin with. Anything that fits on one, will fit on the other.