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05-17-2019, 06:15 PM
twobjshelbys
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Join Date: Jan 2009
Location: Las Vegas, NV
Cobra Make, Engine: Shelby CSX4005LA, Roush 427IR
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What does your engine builder specify as the recommended octane rating? Unless your car is tuned for the higher octane you will not get any benefit.
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Tony
CSX4005LA
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