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Discussion Starter #1
hi, 08 GXP with Trifecta tune.

i installed an RPM Motorsports hi-flow cat and upgraded the tune. the cat came with a 3 piece extender tube to get the sensor away from the exhaust flow. pretty standard. i installed the 90 deg piece and only one of the extenders due to wire reach. i expected possible issues, but figured it would read rich if anything. or am i looking at this backwards? should i remove an extender or add the second one?

or LS swap it? haha
 
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