I own both =]
O/R H is alot more.. and i mean alot RAW. Its louder, but not overly LOUD on my nonpi stang.
The O/R Prochamber is more of a catted H with a unique sound. Its more like a harmonizing sound, but it makes a sound that no other car with a o/r H can ever make.
Right now i have the o/r H on my car but after emissions im going to replace the o/r H with the o/r Prochamber to see how it sounds.
So far heres the setups i had on my car:
SLP LM1+mac catted h
Flowmasters+mac catted h
Flowmasters+o/r H
Mac Catted H+Mac catback!
Flowmasters+ O/R prochamber
Right now= Mac Flowpaths dumped with O/R H
If you want to hear the sound clips than let me know.
Btw, flowpaths dumped sounds exactly like a loud ass
flowmaster when revved to red line in nuetral.
O/R H+Mac dumped=
http://media.putfile.com/exampleofquietcruise
Shorter Clip of
O/R H+Flowpaths-
http://media.putfile.com/MIC-2007-06-16-20h40m34s SEX on Wheels =]
and
o/r
prochamber+flowmasters with tips and tailpipes-
http://media.putfile.com/Flows-and-prochamber Turn your bass all the way down to hear the unique prochamber sound.
What do i like better when asking about tone? O/R Prochamber
What do i like better overall? Prochamber...
What do i run now?? O/R h? Why its louder, but still has a nice tone most of the time. One thing the o/r H adds is a BLATTT which is annoying.. sounds like a harely davidson. But listen to my clip titled, "example of quiet cruise" Thats the o/r H and Mac flowpaths, but it will sound nothing like that unless you remove your tips and tailpipes. But i guess you get the idea alittle. SOUNDS FREAKING GREAT THOUGH!!
If you dont want really loud nor the BLAT than i suggest the O/R prochamber. If you listen to the clips than you can hear the sound difference. The prochamber has more of a AIRING type sound that sounds sicccccc in person and on clips while the o/r H is more raw and blatty.
Any questions!! Just ask.