Re: How much HP gain with LT headers and x-pipes?
What brand long tubes? Depending on the brand, it sounds cheap, about right, or expensive.
HP gain in a N/A car will probably be 10-20 rwhp. In a positive displacement supercharged car, figure 3-4 rwhp (read a real interesting article on why), in a turboed car, figure 20-30 rwhp, in a centri SC car, figure 20-30 rwhp...and then all of that depends on the amount of boost.
So...yeah, confused yet?
"When I know more, I'll be forthcoming. Or I won't be forthcoming, and I'll be honestly deceptive." - Les Miles