Too much work, and I'd never come close to getting my money back, then I have to buy and build another cam only engine, no thanks. I'm sure it will run just fine the way I am setting it up. I don't think it is going to lose anywhere near as much power as you guys do. I'm going to hang on to the headers for awhile and if it sucks I'll put the headers back on. But I am sure it is going to be just fine

i cant wait to see what happens. i dont think they would boast about headers as much as they do and advertise such performance gains if there not a Significant difference over even polished manifolds. i really cannt see it making the same power.

Those look very nice. I've never heard of LS1 manifolds being ported, I'm curious how they perform.

Yeah no company would EVER exaggerate their statistics to make money. I am sure it is going to lose out on the top end by maybe 20HP, but I bet midrange will be about equal and the manifolds will put out more on the low end.