E46Fanatics - View Single Post - Andy's HPF Stage 3 "SLEEPER VERSION" w/833rwhp SAE on Race+Meth
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Old 04-04-2012, 10:09 AM   #14
HPF Chris
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Join Date: Feb 2006
Location: Portland, OR
Posts: 3,684
My Ride: 2002 M3, 2006 530i
Originally Posted by Bdave View Post
So, why have a Stage 3 and a 4 inch exhaust? Perhaps only under the most extreme builds or simply wanting the nioise all the time.

The numbers are too good not to go this way of the sleeper exhaust in almost all cases. An on demand exhaust cut out can always be added for what ever reasons. Sounds like best of all worlds.

Chris, how would the car sound by substituting a Borla V2 Mid pipe(deeper tone?) Will that flow as well or better than the OEM STOCK SECTION? What about no mid pipe? Would it drone with no mid pipe?
I believe we did a car with the Borla exhaust system and it was down 60rwhp over the HPF titanium. My guys can correct me if I'm wrong on that one.

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