Quick view DENSO DENSO Iridium Spark Plug — Iridium MSRP: $11.95 - $23.95 Experience superior performance with the DENSO Iridium Spark Plug from Discount Moto Gear. Features:Six times harder than platinum, iridium withstands temperatures up to 4,000°F.With iridium... Choose Options Choose Options Add to Wish List Add to My Wish List Create New Wish List