60,000-Volt Pro Series ignition coil packs increase power to the spark plug up to 400% over stock with ZERO Ohms of resistance! Designed to be a direct OEM replacement, They exceed OEM specifications, are OBD-II computer safe and feature silicone magnetic steel core patented technology. By optimizing winding process and material diameters, GMS was able to double the factory coil output. Brass secondary contacts assure the maximum output from the coil reaches the plug every time. Another great feature, the bodies, brackets and towers are all integrally molded into one unit with brass inserts to relieve compression pressure caused when tighten down the coils. A must have for forced induction applications.