I`ve been reading everything from this group for about 2 months.Everyone seems to be very knowledgeable. This is my first post. I bought an 2004 GMC 2500 HD 6.0 last July.I just can`t seem to leave anything alone.So I started adding performance parts to it.My Brother-in-law works at an auto parts store,so I get everything at his cost.Which is extremely cheap. All the parts were in stalled by myself. Power Programmer Cold Air Intake
2-1/2 in. Cat Back
1-5/8 in. Headers Underdrive Pulleys (crank,alt) Got pressured into taking it to the track. Best E.T. was 14.886 @ 88.564mph I think the mph was down cuz it weighs a ton,and it's like driving a brick into the wind. I know the stock set-up is 300 hp,but can anyone take a good guess how much power I`m making now? I wish I knew what stock e.t`s were. Sorry so long for my first post.
Kevin