taco eater :
Eric Cron from Chicago, IL United States
My stock 1983 nu50 went from 26 to 34 with this exhaust - no other changes. As others have mentioned, the fender kind of hangs loose now as it doesn't attach to this exhaust. I just bent it a little towards the wheel to keep it from banging this pipe.
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I LOVE IT!!!
August 8, 2023
taco eater :
Mickey Haddox from INDIANOLA, IA United States
I put this on my NU50I with the DR70 kit and a VM18 and was pleasantly surprised on how quiet it was! Most the noise came from the intake. It bolted right on, and with a copper crush gasket sealed perfectly. I was ripping around at 50 on a flat with a BX31. Really happy with my purchase, I'd say it's worth the price.
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Nu50 ripper
August 29, 2022
taco eater :
Ty Bernd from Richland, WA United States
Was a bit too large to fit into my exhaust port, which is weird because the next level stock with the same specs didn’t give me any trouble. I got it to stay in place but the nut is pretty close to the tip. I’d dremel it but it won’t be equal all around so I don’t really know what to do, takes off like a rocket though at 25 and gets me to 35 for a nice gain of top end. I’d recommend.
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Nowhere for rear fender stay to attach.
April 30, 2022
taco eater :
Chaz from NY United States
This pipe will leak around the connection to the head without a gasket, had to hand-cut exhaust gasket sheet material as OEM copper gasket is no use.
This is advertised as direct fitment for Honda NU50 however the rear fender stay attaches to the OEM pipe and this pipe has no provisions for it. I slid a piece of fiberglass mat between the pipe and the stay to keep it from scratching the coating on the pipe but what am I supposed to do? Cut the stay off? Grind and weld a tab onto a brand new coated pipe? DERP!
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not quite bolt and go on stock cylinder
April 2, 2020
taco eater :
Joey Poole from Washington, DC United States
the flange is a bit too large to mate with the stock cylinder. however with a quick beveling courtesy of a dremel, it fit pretty well.
bit of low end performance lost for nice gains around 10-15 mph up until the 30s
edit: revisiting this to say this pipe gives mondo performance out of the stock cylinder. it easily pings my 35 mph speedo. I'm guessing high 30s or touching 40 with stock jug, carb, jetting, bx31 belt, and this pipe.
No issues here 
Nu50 ripper 
Nowhere for rear fender stay to attach.