HKS Super Fire Racing IRIDIUM + PLATINUM DOUBLE PERFORMANCE M40 Set of 12 (New, these are 2200 yen each.) Used in an RB26 engine. All 12 were replaced after approximately 1000 kilometers of use. They were working without issue before replacement, but these are used items. Please understand that there is a possibility they may not ignite, and only purchase if you accept this. *Please check the images for the condition. Please confirm compatibility with your vehicle. We cannot accept cancellations, claims, incorrect part numbers, returns, or refunds under any circumstances after purchase, so please consider this before purchasing. They will be shipped in simple packaging. (Individually wrapped, no box) HKS / H.K.S. / Plug / Ignition / Super Fire Racing / M40 / Spark Plug / Ignition / Ignition Plug / Iridium Plug / Platinum Plug / Denso / NGK / Platinum / Consumable / Race / Track Day / Circuit