The Goodrich KD's are a better tire for autocrossing and drag racing but they do not currently make a 265/35x17 for the front. The autocrossers I know are using the 245's up front and the 295's in the back. That is because of NCCC Group I class rules. The SuperCar Tires are pretty good for drag racing and should give you 2.1's in the 60 ft times. Some serious drag racers claim to be getting 1.9's. The corvette drags I have been to show moslty 2.1's. The KD's ususally get in the high 2.0's. Probably a good side benefit of the KD's is slightly better tire milage.