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I had the Stainless Works cat back system installed. I get the PO420 code. When I reset it does not come back until I drive the car hard. I drove on vacation 900 miles one way with no code until I dove it hard on curvy roads. Camaro SS runs fine and sounds good.
I ordered the Big Daddy Simulators, I will let everyone know if it works.
2017 Camaro SS
Diablo Sport 93 tune
CAI
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