I ordered the Bama x4/sf4 tune with custom tunes, I own a pypes axle-back muffler mod, but on the custom fill out sheet I selected the cat-back pypes mod instead. Would this require a retune? I know in the website it stated that axle-backs/cat-backs revisions didn't require one but I was just making sure. Thnks.

 

Don't think it would make any difference but call 'em to be sure!!

 

The form should have a comments box where you can list that. I would not choose the Cat Back option. I have Roush AB and i just left a comment that i have it installed.

 

If your a free tunes member, just redo it, to be sure.