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Headers can also be custom-designed by a specialty shop. Due to the advanced materials that some aftermarket headers are made of, this can be expensive. An exhaust system can be custom-built for many vehicles and generally is not specific to the car's engine or design except for needing to properly connect solidly to the engine.
The magnitude of the exhaust scavenging effect is a direct function of the velocity of the high and medium pressure components of the exhaust pulse. Performance headers work to increase the exhaust velocity as much as possible. One technique is tuned-length primary tubes.
Locations where exhaust pipes from individual cylinders merge are called "collectors". The diameters of the exhaust system are designed to minimise back-pressure by optimising the gas velocity. Extractors/headers usually have equal length pipes for each cylinder, whereas a more basic exhaust manifold may have unequal length pipes.
Dodge's Charger Daytona EV boasts the "Fratzonic" exhaust feature, which mimics traditional engine sounds with speakers and programming.
2009 Lingenfelter C6 ZR1 at the 2011 Chicago Auto Show. Lingenfelter Performance Engineering (LPE) (also known as Lingenfelter) is an American automotive engineering manufacturer specializing in high-performance automobile modifications, manly and specifically engine blocks, intercooling, transmisson, exhaust pipes, valvetrains, suspension, brakes, pistons, camshafts, and supercharging, Now ...
Silencer (silver) and exhaust pipe on a Ducati motorcycle A silencer cut open to show the insulation, chambers and piping inside the shell. A muffler (North American and Australian English) [1] or silencer (British English) is a device for reducing the noise emitted by the exhaust of an internal combustion engine—especially a noise-deadening device forming part of the exhaust system of an ...