It can be done.
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.
A properly tuned exhaust system optimizes backpressure, which helps to keep the air-fuel mixture in the combustion chamber for a longer duration, allowing for more efficient combustion. This is achieved through the design of the exhaust headers, pipe diameter, and muffler configuration, which work together to enhance exhaust flow while maintaining the necessary pressure. By preventing the premature escape of exhaust gases, the system ensures better engine performance and efficiency.
I have a M109R with Cobra Exhaust, Dyno'd and Jetted and Tuned, 137hp. Thanks.
Certainly a modified muffler on a 2 stroke-cycle engine will affect gas consumption and power. The reason is that these engines do not have an exhaust valve to keep in the gasoline vapor until it has been fired like a 4 stroke-cycle engine has. The "2 stroke" engine relies on pressure in the tuned muffler to keep the gasoline vapor from shooting right out of the cylinder before the spark plug ignites it. With a "4 stroke" engine, there is an exhaust valve to keep the gasoline vapor in until it is ignited, and the engine isn't much bothered about muffler tuning, size, or even not having a muffler, at all.
The standard strings on a guitar are tuned to the notes E, A, D, G, B, and E. The thickest string is tuned to E, followed by A, D, G, B, and the thinnest string is also tuned to E.
The bagpipe is tuned to the key of A (although it differs slightly from the standard key of A).
The electric guitar is typically tuned to standard tuning, which is EADGBE.
The lowest guitar chord that can be played on a standard-tuned guitar is the E major chord.
The exhaust pipes in automobileexhaust systems are designed as acoustic resonators that work with the muffler to reduce noise, by making sound waves "cancel each other out"[1]. The "exhaust note" is an important feature for many vehicle owners, so both the original manufacturers and the after-market suppliers use the resonator to enhance the sound. In 'tuned exhaust' systems designed for performance the resonance of the exhaust pipes is also used to 'pull' the combustion products out of the combustion chamber quicker. (From Wikipedia)
The guitar is typically tuned in standard tuning, which is EADGBE from the lowest to the highest string.
A tuned PCM from www.pcmforless
The notes of the open strings on a standard-tuned guitar, in the order EBGDAE, are E, B, G, D, A, and E.