So why X-pipe?

[X_HAWAII RT]

why install an x-pipe into the exhaust system instead of just straight pipe it?

thanks.

[ME111]

why install an x-pipe into the exhaust system instead of just straight pipe it?

thanks.

Straight out of "How To Build Horsepower" by David Vizard ..

"Extensive dyno work & highway testing has demonstrated that a simple crossover pipe -interconnecting the two sides of a dual-exhaust system just after the collectors & ahead of the mufflers- can increase engine power.
The power benefits of a cross-over pipe apply to both street & race cars, but the reason for power enhancement differs in each instance.
In an open exhaust race vehicle with a x-over between the collectors, the pipe transfers exhaust shock waves from one side of the system to the other.
With a street system, the x-over pipe performs an additional function: The x-over allows each side of the engine to partially share the combined muffler flow capacity.

Although, even the most effective x-over will not double system flow, improvements of 25% are common.
Crossover systems can be constructed in several different ways. The single, straight crossover is acceptable when muffler flow capacity is exceptionally high, but a double x-over system will increase performance if the mufflers are restrictive or engine output exceeds 350hp.
In simple terms, the more restrictive the mufflers, the more essential the x-over pipe becomes."

[X_HAWAII RT]

thank you.

[ll ViPeR II]

Beautiful.