Darkhorse SC /GTD Tune

Level 1 Tuning covers stock engine configurations and basic bolt-on modifications, assuming you're using the original, stock-style fuel system AND stock injectors. Level 1 tuning covers vehicles running on 91-93 octane fuel, providing optimized performance for everyday driving with readily available fuel. Level 2 Tuning covers everything beyond Level 1, including extensively modified or built engines. Level 2 tuning covers vehicles with upgraded return fuel systems, aftermarket injectors, and those utilizing alternative fuels like E85 or Race Gas. Choosing Level 2 allows for maximum performance gains tailored to your specific, high-performance modifications. **Hptuners only** Credits required are: 4 for ECU 6 for TCM