To find out, we decided to run a series of tests by comparing headers against stock exhaust manifolds ... and Fel-Pro MLS head gaskets. See All 18 Photos 3.Topping the 427 LSX combo is a set ...

No matter how many times we test them, it still amazes us how easy it is to make power with GM's LS ... exhaust options are available, the latest of which are Hooker's new Turbo Exhaust Manifolds ...