Compu-Fire 20550 Elite 1 Digital Electronic Ignition - HDE-2 Single FireBrand: Compu Fire Features: All circuits are contained on the timing plate There is no module or anything else to mount The HDE 1 and HDE 2 have fixed advance curves and 6500 RPM rev limiters to protect the engine Model HDE 3 has eight advance curves and an eight stage rev limiter adjustable from 6000 to 7500 RPM or off. All models have the Accu Ray timing LED for precise timing and system check Details: Compu Fire Elite 1 Digital Electronic Ignition