Thread: GTB Performance | AR Design Downpipes : Huge Power gains!
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      03-15-2013, 11:59 AM   #6
double trouble
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Drives: E60 m5
Join Date: Feb 2011
Location: Dallas

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Originally Posted by Rich@GTBPerformance View Post
Are there significant performance differences between catted versus catless? Do both require tune to get rid of the CEL?

Ben
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