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I would see if the dealer can reflash the ecm, in case something is wrong with the stocktune. Otherwise... mine was about 11.5 AFR across the board and was 32xhp no up and downs on the AFR at all...
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2010 IOM RS/SS TVS2300, cam, stall, headers
2002 Z28 427
2002 SSLE Convertible
1968 383 Camaro
1968 327 Camaro Convertible
1967 RS 327
1967 Pro-Tour LS3 in progress
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