4 of 4 Items
4 of 4 Items
Wake up your early-generation 6.6L GM diesel and unlock modern common-rail responsiveness with our master selection of custom EFI Live performance tuning maps built for 2001-2005 LB7 and LLY Duramax engines. These classic platforms feature robust internal components but are heavily limited by dated factory fueling software boundaries. Our dyno-tested calibration maps reshape your injection pulse widths, maximize turbocharger response paths, and optimize fuel balancing curves cleanly. Designed to work flawlessly alongside physical multi-position rotary switches, our custom tunes allow you to shift power levels instantly on the move from a clean street configuration to a heavy towing layout or an aggressive track profile, delivering smooth torque delivery and matching your fuel injection system's strict mechanical tolerances