The Denso Industrial Plug and Boot Kit is designed to keep your plug safe from hostile engine environments. The protective rubber boot insulates the plug from the harsh engine environment, while the special nickel plating improves corrosion resistance. The high dielectric ceramics provide superior insulation and protection from electrical shock. This kit is specifically designed for Cummins applications and is the perfect solution for keeping your plug safe and secure. FleetPride is your First Click in Heavy Duty®.