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Discussion Starter #1
This was the dyno with my off road H pipe installed.



Then run 4 is with my High Flow H pipe install.




A difference of 9.4rhwp / 12.4 rwtq

So I guess the O/R is really worth it. :)
But it's just so loud. :(
 

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Nice info! OR H Pipes really are loud, but reading your graphs as best as I can, you've easily got 10-12 more hp at 5500 rpm. And you average 6-8hp across the board.

But, heck, I know how annoying the sound can get. I'm not a teenager anymore, and there are other ways to pick up that 10hp.
 

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Discussion Starter #4
KeithCobraUH:

Elite Performace was a WestSide Mustang Dyno day and it was free could not pass that up.

Houston Performance was $75 dollars and the guys are very helpfull and nice there. I have dynoed 3 other times there and will continue to go back to them.

GulfCoastMustang:
I am at the point now that enable to get 10hp I have to pull my heads (which I am about to do anyways). I have done all bolton's. Its only about a 30 minute job to switch from O/R to High Flow.
 
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