Just brought my car to the Mustang Dynamometer by my house ( Kaltech ) . Car did 3 pulls car made a best of 536 HP and 710 Lbs torque , the other runs were 536hp/685tq 526hp/676tq on the best pull it made and average 493hp through the test .........i was kinda hopping for over 600 in the HP range but i guess the numbers are good . Brian the operator said they call it the "Heart breaker dyno " i was thinking maybe i should try the .85 housing i have a .63 on my 6776BB turbo ......boost @29- 30 psi / C -16 ........no nitrous