taco eater :
Brian and Albert from overland park, KS United States
We love this pipe and have purchased 7 of them. And we will continue to buy them for every build we can. But after ripping a bike apart a few times over because it ran like trash. We figured out one of these pipes had a cork plugging the pipe right at the silencer. Maybe part of manufacture pressure test? Had to remove the silencer to see it. Really ruined a few hours and made us question our build skills until the only possible thing left to look for was and exhaust restriction and bam there it was. So look out if you put this thing on and you don't run right or at all.
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Good for the V1 too!
September 13, 2017
taco eater :
Guillaume Guite from Quebec, QC Canada
Put this on my V1 and saw a big improvement on low and mid range with a stock motor. Just had to file the flange holes and make myself a nice bracket. The header is quite large so take the studs out and use some really short (12mm on mine) M6 allen bolts.
Helps with the hills. Also barely louder than the stock pipe.
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Pretty Good for 50-70cc
June 30, 2017
taco eater :
Andy from Detroit, MI
The Good: It's got a multistage chamber and is adjustable bleed. It's got a huge baffle and is infact very quiet when the M8 is plugged in the end. The welds seem good and it bolts up to Maxi / Magnum with no hassles as the rear hanger offers a lot of adjustment (use a bracket for Magnum)
The Bad: Most of these issues come with time. The clear coat is going to burn and peal off. Once I hit about 350F the whole header and part of the cone clear pealed off in one ride. The baffle is gonna rattle loose and start dripping oil all over the chamber. That oils gonna get on your rear wheel and burn and smoke off. Luckily you can just buy a new baffle. Last the header is 23.5 mm which is fine for most things but kinda sucks for big engines.
Performance: Low end is okay I suppose. The pipe hits in the mids and pulls through the highs. This is pretty good if you're trying to go as fast as possible, if you're city blasting I'd stick with a Proma Circuit.
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If I were in Iran I'd be beheaded for idolatry.
July 10, 2016
taco eater :
Brian Singer from North Wales, PA United States
This pipe was an upgrade from the Techno Boss I got with my treats kit v2 and it effing RIPS. I No longer feel like an asshole coming off of a red light. Seriously it's got the whole range, lows to high but the mids are exceptional. Once I reach top speed I lay off the throttle a bit and just cruise. For once my rpms aren't all over the place and it's all thanks to this bad ass pipe.
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Puch Maxi Sport e50
May 27, 2016
taco eater :
Bob Brockett from Brooklyn, NY
Been on my watchlist for over a year and finally bought this sidebleed. Extremely happy I did!! The improvement over my last pipe (Boss) was incredible how drastic that pipe was doing nothing for the performance compared to this pipe. I live in NYC so there aren't too many places to top it out, but even riding on the highway, at wide open throttle at what I thought was top speed this pipe allows my bike to keep pulling faster.. Crazy sauce. Engine: ported, airsal 70cc, super stuffy crank with a 15 bing.
The bad: Pedals DO NOT work out of the box. You will need to cut and re-weld the pedals Buddy pegs do not fit. I had to re-weld one of them so it wouldn't hit on the top side of the baffle. The exhaust bracket didn't match the slot on the exhaust so I had to drill a new screw hole to match up with the slot on the pipe.
Otherwise this is one of the best purchases I've made for the overall performance of my bike. Couldn't be more stoked!
awsome well rounded perfomance but watch out 
Pretty Good for 50-70cc