The PS50 and PS60 Coils are ideal for street cars packing a little more power and are running a FAST? 6I Ignition, XR700 or 3000 Breakerless Conversion Ssystem or the E6 CD Ignition Controls. These coils feature lower resistance windings to ensure the most voltage possible is brought into the coil with an optimized turns ratio for the best output. This combination is ideal for engines that endure higher RPM and performance such as circle track, road racing and off-road racing. The coils are filled with oil for optimum cooling are housed in a sturdy steel canister that can handle the abuse of racing. They?re topped off with an alkyd molded top and brass, screw-type terminals.