Enhanced Performance: 47cc 49cc 2 Stroke Pocket Bike Mini Quad Exhaust Pipe Muffler with Expansion Chamber Review

3 days after installing the product all the welds have burst and the pipe is as useless as the junk I removed. Thank you for selling junk quality exhaust systems. Never do business with you again.

Too small diameter of muffler head and core barrel. The head tube is not bent on the mandrel, another disadvantage is the lack of tube diameter at the bends. The flange creates a significant mismatch on even the smallest cc engines. Far from useless on a 49cc head.

The welds are really bad. I have a weld leaking, got it today. The fit was fine on my x1, although the battery compartment is a bit off. Overall very disappointed with the quality. *UPDATE* One weld is completely broken and the other welds have two pinholes that leak a lot, very poor quality, wish I could have gotten it myself.

I've had it for about 2 weeks and my 17 year old friends and I rode my bike then I asked little brother Ed if he wanted to ride and he did and so did he crashed and the exhaust pipe broke but the pipe held up pretty well, just wish they had included the lock glue with the bolts. The screws came off very easily and I lost one of them. As I said, but I corrected it.

Bought this pipe to put in a 66cc mountain bike motor kit. I had to cut and rearrange the flange and make a bracket. The expansion chamber is a bit small, but that affected the stock engine's low-midrange power and sound. For the price it was worth it as a simple mod. But don't expect 35mph without porting and other work. It's also a bit noisy but sounds like a small bike.

Great exhaust system for small engines. I used it on my 52/49cc. I have the motor I used in the review photos. That exhaust system is almost perfect after cutting off the suspension and this bike is very, very small which is impressive. Judging by the custom motor mounts, I'm no welder or mechanic. So I could "customize" it, but it's almost complete, very, very minor exhaust leak. Build quality has been good so far, will update if anything changes.