“What’s a glass pack?”
“A glasspack is a type of automobile muffler in which the exhaust gas passes straight through the center of the muffler. The basic design consists of one smaller tube centered inside of a larger outer tube that is enlarged or swollen in the middle. The gap between the swollen part of the larger outer tube and the smaller diameter center tube is packed full of fiberglass, hence the name.”
“Glasspacks are an old, simple, and relatively inexpensive muffler design that are effective at reducing back pressure, but not very effective at muffling noise. They are usually easy to identify by their simple tube design. Most are painted or powder coated red, but not all.”
Thanks for the explanation. Do,they pass inspection in strict epa regulated states?
And to all of the comments about state inspections, those don't happen everywhere. I live about 6 miles outside the Chicago metro area, and we don't have emission inspections here. That happens just inside the metro area. Of course, the rules are probably different by state....