if the flowmaster is breaking the wallet to bad, check out summitracing or jegs online. you can order just what you need. they will have the cat you looking for too. i have a dynomax muffler. its a 3" straight thru design. kinda like a glass pack, but it has probably 10 to 12 times as much insulation. the whole thing is about 8" round and 22" long. sounds like a real muffler. real aggressive sound like a flowmaster but about 1/2 the price. its all welded too.