[LS1Silverado05]

Originally Posted by 78novacaine

well the fact that i picked up 2 mph with the duals and LTs speaks for itself. i was making 320 rwhp and 335 rwtq with stock mani's, stock y-pipe, and a neutered catback (open y) and was trapping 108 MPH with a 1.9x 60 ft on street tires. i am now trapping 110 mph consistently regardless of the 60' (ranged from 2.0x-2.2x) and that was in much warmer/ more humid air (and not hooking worth a damn, obviously), so according to what i hear, i picked up at least 20 rwhp, so 340 rwhp on a 12x,000 mile car with stock ls1 intake, stock TB, stock pulleys, and untuned seems to be a pretty damn good power level if you ask me

p.s. i was trapping 105 with the stock lid and stock catback w/ chokemaster weld-in (previous owners handywork ) so i picked up 5 mph with the LT/TD w/ moroso/lid only setup

Im not saying they dont work... but I am sure ALOT of your gain was from the LTs and Duals in general... Since this will be on a turbo car I dont want any unwanted restriction....