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For those that had this done, can you confirm it is done thru the ecm. I was told by dealer they plug a device into obd port that communicates to gm via satellite for the download.
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Sold 2012 2LT RS 12.3@112 old setup
Sold 1967 Camaro Pro Street. Ran 10's mild BB on NOS.
2017 HyperBlue ZL1 A10 ** Born 3/17/17**Delivered 4/08/17
2020 Build: Mag2650, BTR Stage2, NW103, BG, 14% lower, 90mm upper, ARH 2" Long system w/no cats, SW Legend mufflers. **807hp/762tq on 93 gas** and **848hp/792tq on e47**
Sold 2018 (Go Mango) Dodge Charger Daytona 392 Daily Driver
Daily Driver 2021 BMW M340i Xdrive
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