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.
It would be a louder world without mufflers.
are glass pack "cherry bomb" Mufflers legal in louisiana
Even South Carolina requires mufflers on all cars
There are many places to buy thrush mufflers. They can be found in auto store, supermarket, outdoor market. There are various kinds of thrush mufflers on offer.
scarf
No.
Yes Vance and Hines do sell racing mufflers. You can purchase one at their website vanceandhines.com.
A person can buy Harley Davidson mufflers directly from a Harley Davidson licensed dealership. This would be the best places to buy Harley Davidson mufflers because they are guaranteed to be genuine and not counterfeits.
Car mufflers were first invented in the late 1800's. The inventor is Milton Reeves, who worked at the Reeves Pulley Co.
john
Yes.
They do not use mufflers.