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The Header-back (or header back) is part of the exhaust system from the header outlet to the final vent to open air — everything from the header back. Header-back systems are generally produced as aftermarket performance systems for cars without turbochargers .
The goal of performance exhaust headers is mainly to decrease flow resistance (back pressure), and to increase the volumetric efficiency of an engine, resulting in a gain in power output. The processes occurring can be explained by the gas laws , specifically the ideal gas law and the combined gas law .
Holley Performance Products is an automotive performance company based in Bowling Green, Kentucky. It was founded in 1896 in Bradford, Pennsylvania , by George Holley and Earl Holley. When the company was based in Michigan it was a major producer of carburetors for many Detroit-built automobiles.
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.
On the intake, a competition airbox feeds 70-millimeter billet throttle bodies and a port-matched intake manifold. On the exhaust, a set of tuned-length stainless steel headers sent spent gases back to a 3.0-inch stainless exhaust system that retained the stock catalytic converters, but allowed them to be easily bypassed for track day performance.
An upgraded 3.8L flat-6 rated at 385 hp is the soul of the GTsport. This modified sports coupe is capable of speeds up to 177.1 mph and a 0-60 time of 4.8 seconds. Upgrades to the engine include a sports camshaft, aluminum headers, modified intake manifold, high performance exhaust system and a remapped ECU. Aerodynamic upgrades include a ...
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