Iridium Spark Plug — IW31 $24.95 PART NUMBER: IW31RMM PART: IW31 BRAND: DENSO NC NY TX WI NV 8 0 2 0 0 IW31,IW31,DENSO 10 in stock Iridium Spark Plug — IW31 quantity Add to cart SKU: 5319 Category: DENSO Features Six times harder than platinum, iridium withstands temperatures up to 4,000°FBecause the iridium electrodes of these plugs can be shrunk to only 0.4mm, voltage requirements decrease while firing performance improves360° laser welding of electrode provides a seal that resists wear even in the worst conditionsGround electrode features a tapered cut and U-groove that form a large volume area for the flame's center Related products Iridium Spark Plug — IW16Iridium Spark Plug – IW16 $11.95 PART NUMBER: IW16RMM PART: IW16MANUFACTURER NAME: DENSO NC NY TX WI NV 0 0 0 0 0 Sorry Out of stock Iridium Spark Plug — IW20Iridium Spark Plug – IW20 $11.95 PART NUMBER: IW20RMM PART: IW20MANUFACTURER NAME: DENSO NC NY TX WI NV 2 1 5 11 6 Add to cart U-Groove Spark Plug — W24ESR-USpark Plug – W24ESR-U $3.95 PART NUMBER: W24ESRURMM PART: W24ESR-UMANUFACTURER NAME: DENSO NC NY TX WI NV 18 20+ 0 20+ 8 Add to cart Iridium Spark Plug — IWF24Iridium Spark Plug – IWF24 $14.95 PART NUMBER: IWF24RMM PART: IWF24MANUFACTURER NAME: DENSO NC NY TX WI NV 20+ 5 0 1 5 Add to cart