lol ya it does. i had my truck tuned twice (first tuner was an idiot). after my mods minus the servo i went from 219 base hp to 273. then had the second tuner (current tune) retune it and Im prolly sitting right around 300 at the wheels. Havent had it dynoed again but need to. so with a shitty tune i got 54 more hp, with a mild cam and supporting mods.

 

I know I won't see that kind of gain with stock manifolds, but for now it should be a pretty good bump in performance compared to stock. What size longtube primaries would you guys do for a 5.3?

 

For your truck, 1-3/4" primaries.

 

a tune can make or break you truck, get a good tuner

 

I'm having black bear retune for me. And 1-3/4" it is then. Thanks!

I want to buy the headers, but also want new wheels.. Modding never ends, huh?