Overall I love this exhaust. I put it on my 09 yfz450R. Sounds really good, I would like it to be slightly deeper but it still sounds great. When I put the system on the new head pipe rubbed on my clutch cable and one of the coil springs on my rear shock so I had to take it back off and dent the exhaust and bend it slightly but it ended up working out. I love the way it looks and am pretty pleased overall.