Engineered for higher energy output resulting in quicker starting, improved idle quality, crisper throttle response and more high RPM power. Compatible with both original HEI ignition systems and later model computer controlled HEI systems that requires no need to remove or re-time distributor. Features special high temperature epoxy resists shock and vibration, while increasing thermal conductivity. The finned injection molded coil cover with integral wire hold down ring, provides efficient cooling ensuring long life and great looks. Comes complete with simplified ground strap, mounting screws, silicone coil gasket and carbon contact brush / spring.