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Exhaust X-Pipes For More Power
By Pat Stevens
Although X-pipes are essential for race cars, adding this modification to a stock car can be a good
idea for many reasons – increased power, fuel economy and less noise inside the vehicle. This type of
aftermarket performance part is something you can either purchase or have custom-made for you by a
good muffler shop. Installation is simple enough for the at-home pro, and the result will be well worth
the effort.
The Evolution of the X-Pipe
To understand the importance of the X-pipe in relation to improved performance and power, you have
to know about its roots. The X-pipe is really the offspring of the H-pipe design, which was first
conceived in the 1960s by the major American car manufacturing companies at the time. Duel exhaust
pipes for V-8-powered vehicles are very noisy, as there is no sound wave cancellation between the 2
separate four-cylinder engines and unconnected exhaust systems. Engineers were looking for a way to
cut down on interior noise levels and improve the engine's power. They realized that running a balance
tube between the two branches of exhaust pipe would work to broaden the torque curve (thus
improving engine performance) and dissipate sound resonance in the exhaust system.
In the 1990s improved technological advancements made it possible to construct an exhaust pipe that,
instead of connecting by means of a balance pipe at a severe 90-degree angle, could unify the two
branches of pipe to create a flow of exhaust in one direction.
Now X-pipes are being manufactured for pop