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Custom Exhaust Systems

Custom Exhausts

Free-flowing exhaust systems may maximize peak horsepower; this is typically accomplished by making the path as straight as possible, using a consistent diameter throughout the system and eliminating obstacles such as factory

 catalytic converters and pre-catalytic converters and replacing them with high flow ones. Also, by replacing the muffler with a less restrictive (and usually louder) one. In a normally-aspirated engine, this may result in the use of oversized piping which may negatively affect low-end torque (forced induction engines are not as susceptible to this side effect). Furthermore, despite the potential (albeit generally slight) performance increases possible by eliminating catalytic converters and other emissions control hardware this is not done (A strict policy followed at Lou's Muffler and performance) because it will render the vehicle illegal for street use and make it fail inspection. Other aftermarket modifications that bypass the catalytic converters and/or mufflers, such as electric or cable activated exhaust cutouts—which open and reroute the exhaust flow to bypass restrictions in the system—can similarly increase performance.

Chevy Corvette (2002)Chevy Corvette (2002)
Chevy Corvette (2002)

Advantages

An increase in peak engine horsepower can be achieved

Gas mileage can be increased in a well designed aftermarket system

Aftermarket parts can be cost effective replacements for stock parts when OEM parts are not readily available (or are more expensive)

Aftermarket parts are often available in longer lasting stainless steel, whereas many OEM exhaust components are made from mild steel and have a limited lifespan

 

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