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I have noticed this same issue. It was kinda noticeable at first, but I just recently took a drive to pismo beach at almost zero sea level and it was very dramatic. I thought for sure becasue the revs were so low it was gunna die, but then it would over rev to make up the difference. I am from reno which is 4500 ft elevation. If the new PTB helps please let me know.
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449RWHP/415RWTQ
2012 2SS/RS 45th Anniversary Edition, JRE 470 CAM, SLP Under drive Pulley, Upgrade valve train, Tinted Windows, AAC Aqua interior lights & foot lights, CAI Intake, Catch Can, Gloss Black 20" 45th Rims, Kooks Headers, Kooks High Flow Cats, Flowmaster American Thunder Cat Back Exhaust, BMR Lowerin Springs, BMR sway bars, BMR rear end links and bushings, Jannetty Racing/SCT Tuned 91 ctane, 12inch Kicker Comp Sub, Custom Driverside Box, VMAX Ported Throttle Body, and Plasti Dipped bowties, emblems.
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