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H and X pipes

Old 10-11-2018, 04:02 AM
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H and X pipes

What is the point (or idea) behind connecting the left bank and right bank together on a true dual setup.

I have an LQ4 with true duals and no such crossover pipe or 'connector'.

Do they typically produce a different sound or help match both banks of cylinders for a V8
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Old 10-11-2018, 06:37 AM
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Re: H and X pipes

The "balance" pipe does make the exhaust sound more uniform and helps scavenging slightly. The H pipe has a deeper, raspier sound were the X pipe is smoother with a little higher pitch sound.
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Old 10-11-2018, 07:47 AM
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Re: H and X pipes

engine master did a really good video on which one to use
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Old 10-11-2018, 09:06 AM
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Re: H and X pipes

Yea about to say Engine Masters did a good job testing them on the dyno.
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Old 10-11-2018, 09:42 AM
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Re: H and X pipes

They equalize the pressure between cylinder banks, which improves throttle response and low-end torque. They make the exhaust SLIGHTLY quieter at idle. The X definitely sounds different from the H, but neither has a power advantage over the other, it's just at a different RPM between the two. It's about 2 to 4 horsepower...
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Old 10-12-2018, 08:14 AM
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Re: H and X pipes

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Old 10-12-2018, 02:14 PM
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Re: H and X pipes

All spot-on, except for the part about the X making more HP than the H.
BOTH produce an additional 2 to 4 HP over nothing at all. The X produces the increase at a higher RPM, and the H at a lower RPM...

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