Tuning Conundrum

[Courtesy Flush]

Originally Posted by re-rx7 Thats why im asking Tim to chime in. I already have a tune. just needing to know if it needs another one. All your doing with the exhaust is increasing flow after the combustion process so the power gain comes form the flow not the actual tune.

I understand. If you currently have cats with your tune and will be removing the cats, yes your tune needs to be updated.