You are correct. The last flash applied to the vehicle is the one that will stick. so if the vehicle was flashed by PHP and then the dealer Flashed it, it will knock the PHP tuning out.
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2005 Ford F-250 CCSB-Lariat-FX4-SRW
SCT - Tunned By Matt @ GearHead Performance
AutoMeter Gauge Kit (Boost, Pyro, & Trans)
Diesel Site Coolant Filtration System
Viper 5901 Remote Start / Alarm
2003 Yamaha Raptor 660R
551st Military Police Co.-101st Airborne Division
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