well i wanted a gt3582 but for right now this time was only done on 17psi and i have yet to turn the boost up. This will be taken care of before my next visit to the track. I should be running near 25 psi by then!! the gt3076 i have is slightly different than the normal 3076's i have a 7 blade 3076 which flows a little better than the normal 6 blade that is common on most 3076's