2-outlet Magnaflow cat-back for GMC Sierra. Installs without welding, just bolt-on. Beautiful sound and nice tone, its tone differs from other cat-backs. Its sound is not too loud, nor is it silent. I've had it installed for over two months and haven't had any issues with the traffic police. Selling to the highest bidder. Serious buyers only. Don't come with lowball offers, check the prices and then make your offer.