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      09-02-2009, 04:31 AM   #13
mixja
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Drives: 2011 E90 DCT Silverstone
Join Date: Jun 2008
Location: Beverly Hils, CA

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Quote:
Originally Posted by mixja View Post
I wonder what the sound would be like with ONLY the primary cat delete....

Most people won't do this because you'll throw a CEL but in my case that is taken care of with Powerchip Stage II...

Hesitant to chop up the factory system - but I guess you could always weld the primary cat back on if it didn't work out....

The other aspect of this I'm interested in is whether the infamous torque dip around 2500RPM would be present with just primary cat delete? I.e. would the remainder of the stock system still have enough backpressure to mitigate the torque dip?
Just saw these from Turner (http://www.turnermotorsport.com/html..._ID=TEN9046MTP) - I guess these would be ideal to do the primary cat delete - anybody got these installed?

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