Tuning Information and Common Questions

DOD/AFM and VVT Information

Displacement on Demand/Active Fuel Management (DOD/AFM) and Variable Valve Timing (VVT) DOD (also referred to as AFM) and VVT became options starting with Gen 4

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Electric Fan Patches

Electric Fan Patches Purchasing one of our LS1, C6, or SPAL electric fan kits? You will need to have your PCM patched in order to

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