Perfect for the power-up of your upgraded Copen after ECU replacement!! These are three unused spark plugs with a higher heat range, ideal for engines with increased horsepower after replacing the current GR Copen's ECU with a D-Sport or Halfway ECU. These are three HKS spark plugs with a heat range of 9 (HKS Plug Copen LA400K KF-VET #9 50003-M45XL). After purchase, I only opened the box to check the plugs. They are practically unused and have not been installed in an engine. However, the box has been opened, so there may be some minor scratches. Please understand this before purchasing.