NGK Iridium Stock Heat Spark Plugs Box of 4 (BKR5EIX)

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 2011-2014 Argo 6x6 650 HD Base 2016 Argo 6x6 750 HDi Base 2015-2016 Argo 6x6 Frontier EFI 694 Base 2015-2016 Argo 6x6 Frontier EFI 747 Base 2010 Argo 750 HDi 8x8 Base 2010 Argo 750 HDi 8x8 Special Edition Base 2011-2016 Argo 8x8 700 HD Base 2011-2016 Argo 8x8 750 HDi Base 2011-2016 Argo 8x8 750 HDi SE Base 2015-2016 Argo 8x8 Frontier EFI Base 2013-2016 Argo 8x8