the glass pack is the same thing as a resonator, i have one on my stock exhaust and its nice and quiet.
it takes the rasp out of the exhaust, cleans it up, and its a straight through pipe, nothing in it to slow down your exhaust flow.
i got a stock diameter 2.25 32 inch long, cut the tube off one side and welded a flange onto it so i could bolt it back to the cat, but you should be able to just clamp it on to the down pipe. and they are super cheap, this one cost 22 bucks at autozone.
i wonder if its still red lol its been on the car for a few months now. ill have to look someday.
