Details: NGK Fine Wire Racing Plugs are designed to give you a stronger spark from your existing ignition system. Slightly recessed fine wire iridium center electrode requires less voltage to ionize (jump) the plug gap. This allows a stronger spark which will better ignite the air fuel mixture leading to more power. The iridium center and platinum ground electrodes provide extreme durability. Fine wire platinum ground electrode helps to reduce quenching. Shortened height plug requires special plug cap(TRS1233A, B, or c). Hand made in Japan and constructed to withstand the most extreme racing environments.
Package Dimensions: 20x79x68