glasspacks are horrible sounding. you need a wood bed and a mullet to go along with those damn things... i guess theyre not too bad sounding if you have no pipe after them.

 

Glasspacks don't have a good sound, but it'll upset the neighbors. I had em on a 81 F-250 with a 351w, true dual, 12 inch glass packs with 4 inch echo tips, came with the truck, loud as hell, perfect for a teenager. I want to find 2 single chamber Flowmasters for my 07, I've been hearing their not legal for the street though. My boss had em on his 95 Chevy. Loud and with a deep rumble.

 

Ive got lt's on mine true dual 3" with high flow cats and super 44's and the truck sounds loud and aggressive as hell