M4 Full Carbon Fiber Exhaust 2021-2023 Yamaha R7 w/ Stage1 Quiet Insert (YA6814) $697 2021-2023 Yamaha YZF-R7 stainless steel full system with carbon fiber canister, manufactured by M4 Performance Exhaust Systems. *** Stage 1 "Q8" Quiet Insert is included with your purchase, a $43.00+ value *** The system is practically brand new. It was installed on my bike for only 1 track day (~50 miles). As you can see from the pictures, besides the pipes being blued, it looks like it just came out of the box. The install on this system is very easy (3-pieces really helps). It sounds fantastic! It's got a really nice deep twin thump to it. I'm selling it because I purchased two different full systems, due to one being on backorder at the time. If you want to use a credit card or PayPal, I have it listed here: https://www.ebay.com/itm/325480818486 Thanks, Mike