answersLogoWhite

0

Normally the term is "low restriction" muffler. This means that the exhaust gasses can freely pass through the muffler with little resistance. If your term is indeed restriction muffler, then it probably refers to a tuned muffler for a 2 stroke engine. A tuned muffler is one that creates a back pressure or a pulse that runs back into the combustion chamber.

User Avatar

Wiki User

13y ago

What else can I help you with?