{"product_id":"r7438-9-racing-spark-plug-set","title":"R7438-9 Racing Spark Plug Set","description":"The NGK R7438-9 Racing Series spark plugs are designed to withstand the most severe engine environments. Each plug incorporates a fine wire iridium center electrode and a platinum-tipped ground electrode, which work together to boost ignitability, increase overall durability, and provide superior anti-fouling characteristics. The specialized insulator nose design contributes to improved throttle response, and corrugated ribs are integrated to prevent flashover.\n\nConstruction features include a pure alumina silicate ceramic insulator for exceptional strength and heat transfer, a copper core to aid in heat dissipation, and triple seals to ensure leak prevention. These specifications highlight the advanced engineering behind these plugs for high-performance applications.\n\nKey specifications include a 14mm thread diameter, 1.25mm thread pitch, gasket seat type, and a 26.5mm reach. The hex size is 5\/8\" (16mm), with a solid terminal type and an ISO overall height. The pre-set gap is 0.028\" (0.7mm). The center electrode is a 1.0mm fine wire iridium type, and the ground electrode is a single platinum slant type. These plugs are also equipped with a resistor valued at 5k Ohm and have a heat range of 9.\n\nTorque specifications for installation are provided: 18-25.3 lb. ft. for cast iron and 18-21.6 lb. ft. for aluminum engine blocks. These plugs are sold in sets of four.","brand":"NGK","offers":[{"title":"Default Title","offer_id":52663101358392,"sku":"NGK-R7438-9-QTY4","price":50.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/687077094.jpg?v=1784323823","url":"https:\/\/store.motormia.co\/products\/r7438-9-racing-spark-plug-set","provider":"MOTORMIA","version":"1.0","type":"link"}