Accel Super Coils for 2005-Newer GM LS-based engines feature advanced bobbin technology, highly specialized silicone magnetic steel cores, and optimized winding. Their resistance & turns ratios deliver 10%-15% more energy than OE ignition coils. A high-temperature epoxy increases thermal conductivity and resists shock and vibration. These direct replacement ignition coil packs provide faster rise time, longer spark duration, and higher spark energy for optimal performance.