![]() ![]() There are several other terms in usage today, like turbo, bullet and multiple baffle. Muffler design types fall into three basic categories: reactive, absorptive, or a combination of the two. The exhaust note is in the design, not the material.” What sounds good is much more subjective. “Designing a high performance street muffler is a careful balance or blend of science and subjectivity,” says Hooker Header’s Cam Benty. Types of High Performance Street Mufflers This is the noise canceling effect that muffler designers use on certain frequencies to silence them, leaving only the desired frequencies. When two pressure waves have displacement in opposite directions there is an interference that occurs. However, the sound waves migrate through the media without any resistance, making their way down the pipe faster than the actual gases do. The exhaust gas exits the combustion chamber under pressure and meets the low pressure gas in the exhaust pipes and stack up on each other. In an internal combustion engine, these pulses are created when the exhaust valve opens and the hot gas from the combustion chamber enters the exhaust system. This vibration, or pulses of high and low are pressure, move through the air at the rate of a mile in five-seconds on the average – commonly referred to as “the speed of sound.” Sound is simply a vibration that spreads as a wave through air. ![]() Performance muffler designs also consider the sound that does come out of the tail pipe by improving the exhaust note to a more aggressive and exiting sound. Some stock mufflers have been documented to rob 30 or 40 horsepower from a factory high performance V8 by creating excessive backpressure.Īdding a performance muffler to your car can also help to reduce wear on engine components, by reducing engine heat and boosting exhaust flow. Performance mufflers actually improve the efficiency of the exhaust system and retain most of the power that your engine creates. Many stock cars have restrictive exhaust systems to keep the cars quiet and cost much less for the manufacturer. Performance mufflers do not technically “add” any extra power to your car when you install them however they can often help to maintain more of the engine’s power than a stock muffler. Honestly, the most impressive thing that others identify in an automobile right away is the sound that your car makes. Second to move exhaust gasses, and finally to maintain power and performance of the engine while achieving the first two goals. Performance mufflers have three simple goals for perfect operation. Starting from the top we should define what the purpose of a performance muffler is. and Hooker Headers to get the lowdown on muffler basics. Muffler manufacturers make a lot of claims about their products but some of the claims don’t explain how their mufflers actually work and bring a distinct difference to the performance of a car. We enlisted some of the top minds in the exhaust game to understand the in’s and out’s of muffler design by reaching out to B & B Performance Exhaust, Corsa Performance Exhaust, Flowmaster Inc. In this article we are tackling the age old question of how much of high performance muffler design is based on science and how much is slick advertising? With all the different styles and types of performance mufflers on the market with different sound attenuation strategies, it can get confusing to know what is best for your application. Understanding the different types of internal configuration will help you pick the right muffler for your application.
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