Well I went to Z1 Motorsports here in Ga and had them re tune my car from scratch it took John 4hrs. total to finish it up but before he started I had a 10lb pulley and it only made 445rwhp then I took it off and put on a 11 lb pulley on made 449 first pull(this was a few weeks ago)John at that time only got it to 451rwhp so he told me to come back when he has more time to spend with it well 4hrs seem to be enough time b/c here is what he got.