been reading posts on here for a bit and read the faq on Al's site. I'm a little confused because it says you don't need a retune for exhaust, but it doesn't state specifically if it's just for a cat-back or if it includes the downpipe, o2 housing, or exhaust manifold. would any of these mods need a retune?

i sent Al an email, but i know he's busy so if anyone could jump in here who knows from experience it would be great. thanks.

 

wow! 34 views and no one has any idea? bumpity bump...

 

i think you would need a retune if you get rid of your cat. other than that, you should be fine.

 

ok thanks! anyone else?

 

You would not "need" a retune - but lets face reality - it cant hurt you!

If it were my evo I would always get a custom retune - but then again I am insane