right now I only have a complete haltech intake, exhaust mod w/ long tubes, high flow cats, x-pipe, slp loud mouth which gave me 332 rwhp w/ a dyno tune. I want around 450 rwhp with heads and cam ONLY. no chargers. I've been doing some searching on and found some that got 405 rwhp on an ls1 with pretty much the same mods as me and with heads/cam mods like these: heads w/2.02/1.57 valves, 230/230 .566/.566 112LSA cam. what kind of change would you recommend for another 45 rwhp?

 

What's a Haltech intake?
How can you have an x-pipe and a Loudmouth? x-pipe=dual Loudmouth=single

 

you're gonna need all the small bolt ons as well as a steeper cam than the 230/230 with ported heads to make 450rwhp.