[blackedout010]

Ok guys need a little info here... I just ordered a 15 1le but didn't get the npp add on exhaust. I already have the stainless works 3 inch chambered exhaust here waiting with quad tips.. So I was gonna get the 1le or zl1 diffusers... But love the z28's!!!! My question is the spring edition and the z28 the same part??? If so what are the differences?? Thanks!!