What came with your exhaust? Did you get just the 4 clamps or did it come with exhaust hangers as well? I'm not sure if I got everything or not. Here is what came with mine. (I got the sticker and instructions as well)



Do you have any soundclips? I've already heard all the ones at LS1sounds.com

 

I believe those clamps are all you need, thats all that came with mine. You just use the rubber hangers that came with the factory system.
I don't have any soundclips but i guarantee you will love the sound

 

I have Borla adjustable cat back now, how does the GMMG compare to that? Borla has always been the benchmark to judge by from what I have read.