Autolite Platinum Spark Plugs give your engine the long lasting performance and fuel economy it deserves. Autolite Platinum Plugs feature a platinum ball design you get a long lasting spark plug that won't allow the gap to burn open like some other brands. The larger the gap is on your plugs the harder your ignition system has to work to maintain performance. The perfect match for both your stock daily driver or your high performance street machine Autolite Platinum Plugs come in multiple heat ranges to match your engine to give it the power and efficiency you are looking for.