Boost Expansion Chamber Muffler - Black

This expansion chamber used on a two-stroke cycle engine to enhance its power output by improving its volumetric efficiency.

It makes use of the energy left in the burnt exhaust exiting the cylinder to aid the filling of the cylinder for the next cycle.

It is the two-stroke equivalent of the tuned pipes (or headers) used on four-stroke cycle engines which provides you with a boost in power and top speed.

* Orders received Monday-Friday by 3:00PM EST
are eligible for Same Day Shipping!
Except for USPS which ships the next business day.

If you require international shipping please choose either UPS (INTERNATIONAL) STANDARD or UPS (INTERNATIONAL) EXPRESS PLUS. We have found that this is the cheapest way to send packages Internationally. (Neither option does not cover Customs Brokerage, Duties, and Taxes... these are charged to the consignee on delivery). If UPS (INTERNATIONAL) STANDARD is not available in your area please try the UPS (INTERNATIONAL) EXPRESS PLUS as a shipping Method.

Our 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.

If you need help with installation or troubleshooting, kindly use our Builder Locator to find builders near you. Builders are experts with motorized bicycles.