These baffles are excellent, my whistles are 1 1/2 OD and they fit and fit well, no gaps that those who have checked and say they leave a gap visible I didn't measure the pipes properly. The baffles not only softened my exhaust but allowed it to be loud with a nice bass tone, it also gave me the perfect balance of back pressure as I didn't even have to change my jets. I have an '86 Honda Shadow vt500 and these bikes run very lean from the factory. I used to notice a faint raw fuel smell when I removed my factory pipes, but when I installed these deflectors the smell was gone and the slight ticking noise the engine made when running lean also disappeared. I am so pleased with these baffles that I will be buying another pair just to have as add-ons if they ever go off the market. So if you are unsure about these baffles and your tubing OD is exactly 1 1/2 inches, they will fit perfectly with no gaps. To make sure they don't come loose I welded JB's putty around the nut in the pipe to hold the bolts in place. So my video shows the noise I have after the deflectors and I remember my exhaust was twice as loud as what you hear in the video. Excellent barriers.
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