F-1 exhaust has a sound I don't know what it is, but it's served me well. The sound is only noticeable on the minute, only on startup, it goes away when driving. Its sound is pleasant, it has a working valve, the valve is new, it fits directly. It was previously installed on a Fتك Rربع. It has a light weld that doesn't affect air or anything else, and there are no leaks. I removed it and reinstalled the stock exhaust. Selling for offers. Note that its new price is 1200.