H and X pipes
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From: Mississippi
Car: 2006 Chevrolet Cobalt
Engine: 2.2 DOHC Ecotec
Transmission: 4spd auto
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
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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Joined: Nov 2003
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From: Lake Stevens, WA
Car: 84 Z28, 92 C4 suspension F&R, ABS
Engine: 408 LS2, CNC LS3 heads, Comp Cam
Transmission: Magnum F, RTX clutch, Tick shifter
Axle/Gears: DANA 44, Tru Trac, 3:73 gears
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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From: Concordia Kansas
Car: 1987 Iroc Z 1990 RS 1991 RS
Engine: 454 soon 496
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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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From: Colorado USA
Car: '83 Firebird (T/A Clone)
Engine: 350 with L-69 components
Transmission: 700R-4, 2000 RPM stall converter
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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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Joined: Sep 1999
Posts: 3,011
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From: Colorado USA
Car: '83 Firebird (T/A Clone)
Engine: 350 with L-69 components
Transmission: 700R-4, 2000 RPM stall converter
Axle/Gears: 10-bolt/3.73 ..
Re: H and X pipes
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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Slow89Iroc-Z
NW Indiana and South Chicago Suburb
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May 12, 2004 06:01 PM