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Sensor reads constantly and computer adapts very quickly. I've been running flex for years. Usuallly about e40 locally and straight 93 on long road trips depending on availability and destination.
Small savings on fuel, decent power gain. Really not that expensive if you were going to tune for other mods anyway.
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James Montigny
2017 Camaro 2SS A8 - Krypton Green
Magnuson 2650 @ 13psi, Forged TSP Rods/Pistons, TSP Ported Heads, BTR PD Cam, Aeromotive Low Side, DSX Flex, LT4 HPFP, 103mm TB, Big Gulp, Meth.
Built by Killer Performance, Tuned by Justune.
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