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      01-28-2013, 09:11 PM   #4
dbyrd
Over 100,000 miles
 
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Drives: E90 M3 6MT
Join Date: May 2010
Location: Dallas

Posts: 153
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I have the Fabspeed HFC with x-pipe mated to a UUC Corsa axle-back and I love it. It sounds fantastic. I have the O2 extenders, and I have never thrown a CEL. I easily pass inspection in Texas. I went this route so I wouldn't have to refit the OEM cats each year to pass inspection.

I agree that fitament can be an issue - you need to hammer out the heat shield around the cats. This video does clearly explains proper installation:
. I've never had a problem with the cats dragging, but the driver's-side cat does hang low.
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