got a A6 LS3 vette with L/T headers , VR intake, 102Fast, (242,246) Custom grind comp cam, and the car was 498 hp and now got 442 hp and checked for DTC there's nothing wrong and the AFR looks the same with approx 13.
changed the spark plugs, cleaned the air filter and checked the injecters and got the same result.
this is the tune guys, any issues ?