Iridium Spark Plug — IW31 View cart “U-Groove Spark Plug — W24ESR-U” 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 U-Groove Spark Plug — X24ESR-USpark Plug – X24ESR-U $3.95 PART NUMBER: X24ESRURMM PART: X24ESR-UMANUFACTURER NAME: DENSO NC NY TX WI NV 4 0 7 20+ 14 Add to cart Iridium Spark Plug — IU24Iridium Spark Plug – IU24 $14.95 PART NUMBER: IU24RMM PART: IU24MANUFACTURER NAME: DENSO NC NY TX WI NV 11 1 4 20+ 15 Add to cart Iridium Spark Plug — IUH24Iridium Spark Plug – IUH24 $14.95 PART NUMBER: IUH24RMM PART: IUH24MANUFACTURER NAME: DENSO NC NY TX WI NV 2 1 0 1 0 Add to cart