your right but a tune does also adjust timing and fuel, they wont make it a dyno queen with your mods they can flatten out that powerband but anyways i would agree its probably not a bad idea to change plug wires and fuel filter although i dont think those are going to be the problems.. your car could also be seeing some false knock with timing retards like that.. just a thought

 

Keep us posted and let us know what the results were!

-Travis

 

I find it strange that my car is running a bit lean after a header install.

Most people are running rich.

I'm seafoaming it, changing wires, and fuel filter. I'll dyno at a different dyno under less intense heat, and see what happens.