Originally Posted by Denny McLain

How about posting a few dyno sheets where you get the 50-60 hp from intake, cats and exhaust as no one else including myself has gotten that amount.

My baseline hp was 281.7 (std) and after intake, headers, cats, exhaust, Cobb dyno tuning was..... 317.3 (std). That is a 35.6 rwhp gain and if you use a drivetrain correction factor of 17.2 % (Based upon actual dyno hp vs factory claimed hp) you get 41.7 flywheel hp. Remember, this also includes headers and correcting the fuel/air to about 12.8 to 1. So the actual gain from intake, cats, and exhaust would be a little less.

Also, what are you using for tuning? Took my car to Cobb in Plano Tx and basically got ZERO gains from the four hour tuning session on their Mustang dyno.