[Bigrodge8]

I have an almost completely stock 08 with just a megaphone slip on and the cat still in place. Do I need to get a tune to avoid grenading the engine or will it be okay since the cat is still in place. I know that a tune would be optimal for performance, but the nearest place to get that done is like 300 miles away. Thanks in advance fellas.

 

[zx racer]

With a slipon youll be fine without pc and tune.