I actually street raced and SRT-8 Challenger when I was driving to the track to race my 63. It had different exh but thats all I could tell. We went from a redlite but I spun bad with 30 lbs in my tires. He put a lenth on me right away but as I eased into it I caught him at the top of first and then put about 2 car lenths on him in second. I lifted then as did he because we knew who was faster and we were doing about 80 to 90 mph. But its not like I blew his doors off as I figured it was a solid mid 12 car. Sounded real good. Ron