I have to start by sayng, I'm not a huge fan of SA. But, I had to have one to ride in a national forest recently. As far as spark arrestors go, I was happy with it. I did rob some power compared to my Shorty, but it was by far the best option I found. If I'm forced to run a SA, this is definitely the one for me performance wise. Fit wise, it took some persuading to get it to line up, and I had to rob the rubber grommets from my other silencer.. Beyond that, it did exactly as promised with minimal power loss.