Hypercoils 6" OBD Coil-Over Spring - 2-1/2" I.D. - 500 lb. HASZ19IM Update ECU Firmware and Adjust

Update ECU Firmware and Adjust Rev Limiters 1 and 2

The company’s philosophy of "Products for Racers by Racers" has launched them into the forefront of the drag racing specialty products industry

Diesel Governor Idler Adjustment Pin

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

Hypercoils 6" OBD Coil-Over Spring - 2-1/2" I.D. - 500 lb. HASZ19IM Update ECU Firmware and AdjustOptimum 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