Working on my Bud's truck... 01 CTD auto, has the Fass pump and good presure, Banks exhaust, brake, Quick turbo housing and Big Head, and the six guncomputer. Last night he installed the exhaust brake and the HYbrid 35/40 turbo and the truck is dogging it off the line. Exhaust temps are up and it takes off in the mid range but falls off on top. This combo should be a rocket ship. He thinks he has a small leak at the turbo but readjusted the housing alignment and it's better. What else can you think of that would effect performance?