NGK IX Iridium Spark Plug Box of 4 (TR5IX)

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.This Part Fits: Year Make Model Submodel 2004 Aston Martin DB7 GT 2004 Aston Martin DB7 Vantage 2004 Aston Martin DB7 Vantage Volante 1990-1991 Audi V8 Quattro Base 1986-1988 Buick Century Custom 1986-1988 Buick Century Estate Wagon 1986-1988 Buick Century Limited 1986 Buick Century T-Type 1986-1987 Buick Electra Limited 1986-1987 Buick Electra Park Avenue 1986-1987 Buick Electra T-Type 2008-2009 Bu