My buddy has new camaro and we hit the interstate the other day. He only has exhaust with no tune. I have 2.8 pulley canned tune and intake. We launched from 40mph second gear and we went on the third horn and right away I put probably put close to 2 cars on him. Through third it was still about the same and in forth he came back a little around a 1.5 cars now maybe a little less. Seemed like was was staying about the 1.5 cars with no change so I shut down. We did it a few times and same result each time.