H and X pipes - Third Generation F-Body Message Boards

Exhaust Post your questions and suggestions about stock or aftermarket exhaust setups. Third Gen exhaust sound files and videos!

H and X pipes

Reply

Old 10-11-2018, 05:02 AM
  #1  
Junior Member
Thread Starter
 
Join Date: Mar 2016
Location: Mississippi
Posts: 28
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
mjoekingz28 is offline  
Reply With Quote
Old 10-11-2018, 07:37 AM
  #2  
TGO Supporter
 
soloc4's Avatar
 
Join Date: Nov 2003
Location: Lake Stevens, WA
Posts: 85
Car: 84 Z28, 92 Corvette suspension, ABS
Engine: 408 ci LS2, CNC'd LS3 heads
Transmission: T56 w/ RTX clutch, B&M shifter
Axle/Gears: 3.73 w/Tru Trac diff.
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.
soloc4 is offline  
Reply With Quote
Old 10-11-2018, 08:47 AM
  #3  
Member
 
kaos420's Avatar
 
Join Date: Aug 2008
Posts: 108
Car: 88 gta
Engine: 5.8
Transmission: 700R4
Axle/Gears: 3.73 POSI
Re: H and X pipes

engine master did a really good video on which one to use
kaos420 is offline  
Reply With Quote
Old 10-11-2018, 10:06 AM
  #4  
Senior Member
iTrader: (2)
 
berlin305's Avatar
 
Join Date: Dec 2007
Location: Concordia Kansas
Posts: 534
Car: 1987 Iroc Z 1990 RS 1991 RS
Engine: 454 soon 496
Transmission: Soon T56
Axle/Gears: 308 Posi
Re: H and X pipes

Yea about to say Engine Masters did a good job testing them on the dyno.
berlin305 is offline  
Reply With Quote
Old 10-11-2018, 10:42 AM
  #5  
Member
 
Join Date: Sep 1999
Location: Colorado USA
Posts: 315
Car: '83 Firebird T/A Clone
Engine: 350 Carbed
Transmission: 700R-4
Axle/Gears: 3.73
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...
T.L. is offline  
Reply With Quote
Old 10-12-2018, 09:14 AM
  #6  
Junior Member
iTrader: (1)
 
Join Date: Sep 2005
Location: SoCal
Posts: 86
Car: 97 Z28
Engine: 396 LT1 478whp 443wtq
Transmission: 6spd
Axle/Gears: 4.10 LSD
Re: H and X pipes

GOTCHEVY is offline  
Reply With Quote
Old 10-12-2018, 03:14 PM
  #7  
Member
 
Join Date: Sep 1999
Location: Colorado USA
Posts: 315
Car: '83 Firebird T/A Clone
Engine: 350 Carbed
Transmission: 700R-4
Axle/Gears: 3.73
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...


T.L. is offline  
Reply With Quote
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
chazman
Mid-West Region
0
12-27-2011 06:56 PM
83_camaro_z28
Exhaust
0
10-22-2009 08:09 PM
RedGut86
Exhaust
0
03-23-2009 02:34 PM
Slow89Iroc-Z
NW Indiana and South Chicago Suburb
12
05-12-2004 07:01 PM
Slush92RS
Exhaust
2
01-17-2001 09:21 PM


Thread Tools
Search this Thread
Quick Reply: H and X pipes


Advertising
Featured Sponsors
Vendor Directory

Contact Us Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: