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I've put 4000ish miles on the intake with the original MAF tube. As of last night, the stock tube just started throwing CEL for lean condition. So, I installed the revised tube with lowered MAF mount flange and cleared the code. CEL came back that night. Going to try to solve with tuning the fuel maps.
For background, this is the only modification to the car, never been tuned. Sitting at just under 18k miles, has manual and NPP exhaust.
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