i actually liked the glass packs on older trucks and such. old chevys and fords with v8 motors. but i dontr think the sound very good at all on anything other than older v8s. i would usually run a flow master or magna flow cat and muffler but cash is tight right now so the least expensive the better. if i dont like the thrush welded then i will go flowmaster with a high flow cat. the cat on my jeep is virtually brand new i ran it for about 2000 miles before turing my jeep into a project so im hoping that it is still ok from sitting.