The RET race car is a 281ci 4V with ported heads from RET and Ford GT cams. The turbo kit started out as a HP kit that is now a custom set up fabricated from RET and Fast Intentions. The old set up had twin 57mm turbos that ran a best time of 9.0@155. This was done on the stock computer using SCT software. It is currently being set up to run twin 67mm Precision turbos. The car should have no problem running mid to low eights with this combo.