getting a custom tune couple of questions.
All my current mods are in my sig. My question is if I continue with simple bolt-ons such as UD pulleys, 160* thermostat, I shouldnt be needing a retune because neither cause any changes in air/fuel correct?
I do plan on doing a fast 92 set up which I know would be best with a retune but thats later down the line. Im working on getting the most out of a bolt-on car until I can do h/c/i.

