H pipe versus X pipe

[suntech]

So i was ordering a new exhaust system for a buddy of mine today. TTI ceramic coated headers, 1-7/8 primarys, and a 2-1/2 system, with X pipe. He has a std 440 in a 68 R/T.
The guy at TTI tells me that the X pipe gains 12-15 RWHP over the H pipe. Sounds like an aweful lot!!!!!
I know H and X gives a gain over a seperated system, but i did not think the diff between H and X was that big!!
Any experiance guys?

[RECHRGD]

Those numbers seem to be consistant with the articles I've read and general opinion on this site.  I ran the X pipe until I installed a
gear Vendors O/D unit.  I had to go back to the cross pipe set-up and didn't really feel any seat of the pants loss of power.  Bob

[mikesbbody]

I thought one (the X pipe) gives more H.P but the H gives more torque? ron knows about this also from what i know the X is alittle quieter

[Ghoste]

I thought the X improved both??

[firefighter3931]

I thought the X improved both??

Generally it does...but it's one of those combination specific things. Some builds will show a higher HP increse than torque because of the cam/compression/exhaust combination.

Overall it's a worthwhile upgrade, inmho. 


Ron

[SFRT]

I have  3" X pipe and its super-quiet, which I like. I have a hopped up 440 and my car is quieter than my friends H-piped  standard issue 383 superbee.

[Silver R/T]

I have X pipe on my Cobra, sounds awesome, Id go with Xpipe

[NorwayCharger]

Some good reading here..

http://www.boyleworks.com/ta400/psp/exhaust.html

http://www.superchevy.com/technical/engines_drivetrain/exhaust/0505phr_exh/index.html

http://www.carcraft.com/techarticles/exhaust_system_installation/index.html

[BLAM]

I go with the H-pipe because I like the extra room for my drive shaft loop.  X-pipes and good drive shaft loops are tough to do together.