sb headers, other than the tti or dougs????????????????????????
One of the magazines (I think Mopar Muscle) did a test of a 300-hp crate 360 with all different types of exhaust manifolds and headers, from 318 logs to Hooker Super Comps. They found about a 3 HP difference going from regular 360 log-type car or truck manifolds to early 340 manifolds, about 5-7 going up to 1 5/8" headers and then again going up to stepped TTIs. Here's the results, I think it's one of the more useful magazine articles out there...
EDIT: Forgot to say the biggest issue with headers is fitment, rather than HP, that makes the pricier ones better...
One of the magazines (I think Mopar Muscle) did a test of a 300-hp crate 360 with all different types of exhaust manifolds and headers, from 318 logs to Hooker Super Comps. They found about a 3 HP difference going from regular 360 log-type car or truck manifolds to early 340 manifolds, about 5-7 going up to 1 5/8" headers and then again going up to stepped TTIs. Here's the results, I think it's one of the more useful magazine articles out there...
EDIT: Forgot to say the biggest issue with headers is fitment, rather than HP, that makes the pricier ones better...