I have a 7ism Cat Back Exhaust for 3.8 Genesis Coupe, the exhaust has been used for around a month on my car. This was the same exhaust that the 3.8 of SFR had installed, Jay used the exhaust for less than 100 miles because his car was mostly used for shows and I bought the exhaust from him, I used it for almost a month, its a great sounding exhaust, I love it! But I need to change because of a sponsorship! I will let it go for $800 shipped! It will be removed next week when I receive the new one!