Engineered with optimized low resistance, high turns ratio windings around an M36 high silicone magnetic steel E-core for higher energy and voltage outputs. Results in quicker starts, improved idle quality, crisper throttle response and more high RPM power. Compatible with late model GM computer controlled remote mount HEI systems. Direct bolt-in, plug-in replacement. Can also work with CD ignition systems. Special high temperature epoxy resists shock and vibration, while increasing thermal conductivity. Brass coil wire contact increases energy transfer and resists corrosion better than aluminum. Comes complete with new mounting hardware. High dielectric strength ACCEL Yellow over molded housing. Output is 48,000 volts with 0.2 ohms resistance.