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      03-28-2008, 05:14 AM   #9
Adam@Riss Racing
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Drives: 2006 Interlagos Blue BMW M5
Join Date: Jul 2007
Location: Irvine, CA

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Quote:
Originally Posted by aus View Post
So there would be a total of 4 cats still with these?
Yes, high flow cats up front. Gives a bump in HP/TQ and stock 2ndary cats. If you're looking for the most power, catless is probably the way to go. Our Riss Racing Catless downpipes have made over 60whp on a tuned N54 already.
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