Swiat34

iTrader: (9)

So I'm researching headers for my 00 LS1 Trans Am and brand names aside, what's the big difference between the 3? I do plan to increase displacement and supercharge the car eventually, but it's gonna be some time down the road. So which header is the best for me to go with that'll give me the best benefits now on a mostly stock engine (minus emissions equipment) and will serve me well under 10-13psi of supercharged boost? I've read so much on each but I'm hoping to get some professional opinions on this. Thanks guys.

libertyforall1776

iTrader: (2)

Funny that Kooks is on here and makes the three, but never answers this question -- which keeps coming up... :-(

Sales4@Texas-Speed

iTrader: (4)

If you plan on heavily modifying the car I would recommend going with 1 7/8 long tube. We have done some engine dyno tests comparing the 1 7/8 and 1 3/4 and the 1 7/8, we found that the 1 7/8 will match low end power of the 1 3/4 and pick up 6-10hp up top. On a heavily modified setup I would expect more of a power pick up.

Swiat34

iTrader: (9)

Thanks John!
So what's the nook for the stepped? I've read the the tapering primaries are supposed to help scavenge exhaust gasses. So what's the performance difference between the 1 7/8" and the stepped?