NGK Iridium-IX Spark Plug 1 Step Colder - MINI / R50 / R52 / R53

THE Recommended spark plugs for when you want to take your 1st Gen MINI one step colder. Getting one step colder spark plugs is an essential supporting modification if you plan on upgrading your exhaust, intake, and pulley. One step cold plugs help by pulling heat away from the combustion chamber faster, which prevents pre-ignition and engine knock on performance engines. NGK Iridium IX spark plugs are specifically designed for the performance enthusiast. Iridium IX provides outstanding acceleration, high fuel efficiency and durability. NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode's durability is six times harder than platinum. Iridium alloy's extremely high melting point is perfect for today's engines. For even greater performance consider upgrading to an NGK Ruthenium HX plug. IRIDIUM ALLOY CENTER ELECTRODE: Iridium's density (6x that of platinum) and extremely high melting point is perfect for modern high efficiency engines RECOMMENDED USAGE: Modified or high performance applications, or as an upgrade to OE nickel alloy spark plugs SINGLE IRIDIUM TIP: Fine wire 0.6 millimeter iridium tip center electrode ensures high durability and a consistently stable spark SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges TAPERED CUT GROUND ELECTRODE: Reduced quenching design produces outstanding ignitability, improved acceleration, fuel efficiency and durability TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal MFR Part # BKR7EIX-11