Enhance your vehicle's ignition system with the MOOSE OFFROAD Spark Plug Resistor Cover, part number 10-M1121. Designed to replace NGK resistor covers, this 90-degree elbow type resistor cover features ceramic resistors that deliver reliable performance and durability. The waterproof caps ensure protection against moisture and debris, maintaining consistent spark plug function in various conditions. Its adaptable thread size makes installation straightforward across a range of spark plug types, providing a secure fit and optimal electrical conductivity. With a resistance of 5 ohms, this resistor cover helps improve ignition efficiency and engine performance, making it an ideal upgrade for off-road and on-road vehicles. <b>Features:</b> * Replaces NGK resistor covers for enhanced compatibility * Ceramic resistors ensure reliable performance and durability * Waterproof caps provide superior protection against moisture * Adaptable thread size for versatile installation * 5 ohm resistance improves ignition efficiency * Allowable wire diameter between 7 mm and 8 mm for secure fit