as most of you know i did an engine swap in my 02 z71 suburban from the 5.3 to the lq9 6.0. im finally at a point where im ready to do the exhaust system. i think im going to use the 2500hd flopro. i want to keep it quiet on the inside with little growl outside. my question is do i need to change out the size of the exhaust ( is there a diffrence in the 5.3 vs 6.0 h.o. exhaust sizes).?? i measured about 2.75 inches diameter on the original tailpipe.
