Performance Speed-Demon Muffler with Expansion Chamber

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FREE SHIPPING on Orders $99+

Color: Chrome
Sale price$25.46 Regular price$29.95


Need an exhaust for your 2-stroke motorized bicycle that’ll give you performance without making too much extra noise? Then the Speed Demon High-Performance Expansion Chamber is exactly what your 66/80cc 2-stroke engine needs.
This Performance Expansion Chamber mounts the exact way its bigger banana expansion chamber does, all while increasing low-end acceleration, top end speed, and keeping your bike quiet with a baffled muffler. With its built-in expansion chamber and shorter muffler, your motor will get better airflow and increase your bike engine kit’s performance.
Long lasting, easy to install, and compatible with a huge range of 2 stroke engine kits, this Speed Demon Expansion Chamber and muffler will out-perform your stock motorized bicycle engine kit muffler like it’s nothing.

Motorized Bike Kit Performance Exhaust Muffler Upgrade with Expansion Chamber is compatible with any 2-stroke 49cc/66cc/80cc Bicycle Engine Kit. Replaces stock muffler with same bolt on pattern requires no modification. This performance muffler has a built in expansion chamber and shorter muffler allowing for better flow and engine performance.

*Note* This muffler does not come with a gasket or specific mounting hardware. However, your existing gasket and mounting screws should be sufficient to optimally run this muffler.

Gasoline operated products are NOT compliant with Environmental Protection Agency ( E.P.A. ) or California Air Resources Board (C.A.R.B) for the use on/off Public roads. Upon purchase, the buyer agrees to use products for racing (closed-course competition) only and NOT for on/off public roads.

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Customer Reviews

Based on 17 reviews
Maria Baptista
RMA Request

Cristian was very helpful and courteous on the phone when I had questions about my return.

Christopher Collins
Performance speed demon muffler with expansion chamber

I love this muffler it's giving me horse more horsepower more acceleration and more top end speed it's smooth out the vibration and it's a lot quieter than it was before I love this muffler it's the best and also looks really cool highly recommend replacing your stock little Chrome muffler with this you will be happy

Colten Tschakert
I'm not sure how much it helped to be honest.

I chopped it off at the end to make a non muffled banana pipe. Way more power. Way too noisy now, but I'd rather ppl hear me. It's safer.

anonymous customer

I cut this pipe at the bend to re-orient it for my 50cc engine. On this engine power really kicked in from 7,000-10,000 RPM. It has a nice motorcycle-like idle and sounds much less like a weed-whacker. Good value, only downside is I noticed the internal pipes connecting to the expansion chamber have some nasty burrs from when they were cut and assembled. The manufacturer should take the extra 10 seconds to de-burr the pipes.

Adam Embry

Love Easy ordering, great product, great pricing plus orders arrive quicker than expected. Thank Bike Berry

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