This is a decent straight through design but I had to cut off the end cap on the intake side to cut the intake pipe because for some crazy reason it was narrowed to almost 1/2 inch. inside before the exhaust reaches the baffle. I also unwrapped some glass while I was there because it still felt a bit cramped by my standards. I gave this muffler the benefit of the doubt though as I use it on a 2 stroke bike engine which has been heavily modified so it's hard to say if it could work as intended on a dirt bike. Camera. But then again I haven't used it on a dirt bike so 4 stars. With a little modification, it was still a lot better than trying to make my own and it looks halfway decent, and the price was very reasonable, especially compared to others of the same type. Because even if I knew I had to tweak it I would still buy it as it now works perfectly and is still quiet enough to keep the neighbors happy.
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