okay this has probably been answered before but i'm looking into getting the JBA Stainless Steel headers. Do they add power that is noticeable?

 

I think I remember seeing an old post where someone put the JBAs on with a new exhaust and pulled out 20ish hp and 20 ft lb of torque

 

junk, the only way to get noticable gains with headers is to open up the y-pipe. even though headers are acutually larger in diameter, they flow into the same restricted y-pipe, by enlarging the y-pipe with the headers is the only way to go.why spend 600.00 for a pipe that flows just as good as the factory manifold. open up the y-pipe and really get noticable gains.

 

i agree with what superdak said, i had a 99 S-10 that i put headers on, and only got 4hp gain.... once i opened the exhaust up, i got a 14hp and 13lb tq gain out ofthe engine...