i got a rt cat i had on my ls for sale, i used it for 180 miles 1 1/2 weeks. the reason i am selling it after having it so short is cause my car is turbo, and i went from a test pipe to a high flow and i lost 5 hp going to high flow. i loved how it was quite and didnt smell but i wanted that 5 hp back. so i am selling it for 160+shipping.