Multi-rib ceramic insulator to help prevent misfires
More focused ignition for better flame kernel growth and faster fuel combustion for better engine performance
Product Review
Product Description
Independent lab tests prove that Autolite XP Xtreme Performance Spark Plugs provide better overall ignitability and durability than many other premium spark plugs. By increasing the size of the flame kernel, a 21 percent bigger flame compared to that of standard plugs, the new Autolite plugs ignite more gas and air mixture inside the cylinders to deliver better overall performance. The ignition is also more focused, which provides better and faster fuel combustion, optimizing the vehicle's spark plug performance.
Comment: after 30+ minutes on the phone with customer support they have no idea WHY amazon is limiting you to buying only 3 of these per account. an 8 cylinder engine that these spark plugs are for REQUIRE EIGHT spark plugs, WHY would you limit the purchase of these to THREE per account? What good are 3 spark plugs to a person that requires 8? good thing they are eligible for FREE Super Saver Shipping except that limited to 3 you cant reach the $25 limit for that savings.