Ask The Editors: What’s That Canister On The Pipe?
Making sound waves work for you. Dear ATVC: I keep noticing these odd canisters on modern aftermarket 4-storke pipes. What are these? Expansion chambers? Close! The expansion chamber was a staple of the 2-stroke exhaust system; a place to store the hot gases escaping the engine in every stroke so as to control the amount […] More »