^ i wasnt talking about melting the glasspack itself, i was talking about the fiberglass on the inside. and you can run the glasspack so the perforations in the tube face either front or back... i would show you a picture but i dont just have glasspacks laying around. you can face the perforations toward the exhaust flow or away from the exhaust flow... atleast the one i bought is like that. and the pop is a backfire, not because i have a leak. its not a poping when i accelerate, its when i let off and its one big pop not an abundance of little pops like an exhaust leak would suggest... i have had an exhaust leak before, and it sounds completely different. this is a loud pop from a backfire... and i know this because i have seen a small flame when my friend drove it and i told him to hit rev limit in first gear then shift... and sure enough a small backfire flame shot out the back.
btw a straight pipe does NOT have perforated sides and fiberglass in it... a glasspack is just a different form of muffler... and i used it so i wouldnt have a ricey bubble-bee-in-a-soda-can exhaust. you can think what you think but i like my exhaust, and so do a lot of ppl around the st. louis area.
so there you have it!