Quote Originally Posted by Fredoops View Post
I'm wondering the same thing, diff back could mean 1 of 2 things:
1- "turbo back" off the front diff, Which is from turbo all the way to the muffler, there's no turbo in the euro so that's out.

2- "axle back" from rear axle backwards, so effectively just 2 mufflers and the connecting pipe, so HALF a catback so to speak (because its got no mid pipe). Gosh I'm hoping he's not charging a whole lot for what's basically 2 mufflers.
Well usually there is two types of systems:

1. Cat-back system - pretty self-explanatory, everything from the catalytic converter out the back (pipe, muffler/s)

2. Diff/Axle-back system - Everything after the rear diff/axle is replaced (muffler, pipes (if it is a dual outlet)

Hope that gives you an idea