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      05-30-2011, 09:30 PM   #89
HP Autosport
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Drives: F80 M3
Join Date: Mar 2007
Location: Santa Barbara, AP, Brembo, GIAC, Koni, Ohlins, Performance Friction, www.hpautosport.com

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Quote:
Originally Posted by rapter View Post
Very interesting

Curious, are you selling your modification to the market?

Could you take some in car sound samples with both systems?

Question about your mid pipe system: essentially the system removes the two cats and replaces them with straight pipes?
Yes, it is available now.

See post# 70 for photos of the mid-pipe.

There is too much cabin noise at speed for anyone to hear the difference between the two pipes.


Quote:
Originally Posted by ray101381 View Post
and CEL's with your mid pipe system? is a tune required? any performance gains that are noticeable? is it a straight forward bolt on with no modifications?
No, no CEL at all since the mid-pipe is behind the secondary O2's. And not tuning is required.

There may be a little gain in HP and TQ from removing the two secondary cats, but we have not verified it yet. The aftermarket system is lighter than the oem unit if that matters. No other modification is needes, just a straight replacement.

Last edited by HP Autosport; 05-30-2011 at 09:37 PM..
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