Upgrade your vehicle's performance with the E3.74 Premium Automotive Spark Plugs by E3 Spark Plugs. These specialized spark plugs are designed to enhance the ignition system and maximize the fuel efficiency of gasoline-powered engines. With a 5-year warranty or 100,000 miles, you can trust these spark plugs to provide reliable and long-lasting performance. These spark plugs are compatible with a variety of vehicles and fitment types, including custom performance applications. The E3.74 spark plugs feature a unique design and special materials to improve combustion and increase power output. Upgrade your vehicle's ignition system with E3 Spark Plugs and experience improved performance without the need to discuss the condition of the spark plugs.