Quote (MrMicc @ 16 Sep 2014 18:51)
2013 impreza sti, stock performance wise. 2.5 l boxer turbo 15psi.
So if i get a decat kit i will not throw codes or require a tune?
Don't just cut off your cat lol... buy an actual down pipe and cat back exhaust.
I'd highly recommend Invidia catless/divorced dp and Invidia Q300 quad tip cat back.
Quote (Thomadinn @ 17 Sep 2014 11:42)
put some equal length headers on instead
If you want to sound like a Honda, sure.
Edit: And yes, you require a tune. Get a Cobb Accessport or bring it to a shop.
This post was edited by AndrewSTi on Sep 17 2014 01:25pm