Hypercoils 6" OBD Coil-Over Spring - 2-1/2" I.D. - 500 lb. HASZ19IM Self-tuning ECU means you dont

Self-tuning ECU means you dont have to be a computer/tuning wiz to have EFI

2019 GMC Sierra 1500 4WD

wheelie bar mounts and a provision for a laterl stabilizer bar

Update ECU Firmware and Adjust Rev Limiters 1 and 2

The reduction in cradle movement also drastically reduces wheel hop

Hypercoils 6" OBD Coil-Over Spring - 2-1/2" I.D. - 500 lb. HASZ19IM Self-tuning ECU means you dontOptimum Body Diameter (OBD) Hypercoils feature a unique design concept that adjusts the body diameter of the spring relative to the end coils. The OBD design enables Hyperco to take full advantage of its ultra high tensile material by optimizing the applied stress through adjusting the spring's body diameter. HYPERCOILS because the most important race is the one you are in. Hyperco is a supplier of precision engineered, high performance suspension