Reviews: Big Gun Exhaust System

We chose the trick new Big Gun exhaust system for its lighter weight, exclusive stepped headpipes, as well as the exclusive Aerospace Ceramic Coating that lowers exhaust temperature by half for a 2% hp increase, with no flaking, rusting, or blueing.

The single most important feature that separates Big Gun from all other competitor's products, is the unique stepped head pipe. All current production 4-strokes come with a single size head pipe. The reason: performance is adequate, and it's the least costly pipe to produce. The Big Gun design is the most costly, labor-intense process. The key to 4 stroke performance is getting the exhaust gases to exit the combustion chamber as quickly as possible. The most efficient way to do this is to match the exhaust header to the exhaust port, in size and shape, as closely as possible. If the head pipe is too large (which is most often the case), the gases exit a small opening into a larger chamber, allowing the gas to circulate, creating back pressure in the combustion chamber.

Why the Stepped Works

The first 8" of pipe coming out of the head is critical. It must match this size of the exhaust port. From this point on, it's critical to gradually enlarge the opening to allow the maximum exhaust to flow yet prevent any 'wash' or loose exhaust gases. Big Gun is the only, exhaust system to use a stepped pipe with a smooth, gradual climb in pipe diameter. Each model is designed and prototyped by hand before the tooling can be made to build each model. This is the only way to accomplish maximum performance.

[Click here for Installation guide]


Big Gun
8628 Utica Avenue , Suite 500
Rancho Cucamonga , CA 91730
(909)948-7029
[http://www.biggunexhaust.com/]