what does that mean im not familar with that anybody no??

tip - pipe - muffler - pipe - frontpipe - downpipe - turbo

frontpipe back would be from the frontpipe pipe and back. the catylitic converter is on the front pipe and replacing it would ditch the cat.

it means that it is a front pipe back system so it deletes the cat and is better than a cat back

Lots of exhaust manufacturers make turbo or cat back systems. On the GMC most exhaust systems are manufactured to connect from the front pipe band clamp back.

So that is why they say Front Pipe Back.

ok so wats better?

getting rid of the cat is better.

2 good links in my signature.. difference of front and turbo pipe, and also install of a front pipe. check them out.