Iridium Spark Plug — IW31 View cart “Iridium Spark Plug — IW20” has been added to your cart. $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 U-Groove Spark Plug — W24FS-USpark Plug – W24FS-U $2.95 PART NUMBER: W24FSURMM PART: W24FS-UMANUFACTURER NAME: DENSO NC NY TX WI NV 20+ 0 0 0 0 Add to cart 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 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 U-Groove Spark Plug — W20ES-USpark Plug – W20ES-U $2.95 PART NUMBER: W20ESURMM PART: W20ES-UMANUFACTURER NAME: DENSO NC NY TX WI NV 0 20+ 0 9 2 Add to cart