MSD Iridium Spark Plug 11IR4Y Resistor Type with Projected Tip MSD3731 Product:Gasket Seat. 14mm x 3/4" with 13/16" Hex 57i Intakes are not legal

57i Intakes are not legal for use in California and other US States adopting California emission standards

Part Number: AF98-2113

2005 Acura RL 3

2011 KIARIO II 1

MSD Iridium Spark Plug 11IR4Y Resistor Type with Projected Tip MSD3731 Product:Gasket Seat. 14mm x 3/4" with 13/16" Hex 57i Intakes are not legalIridium Spark Plug 11IR4Y Resistor Type with Projected TipGasket Seat. 14mm x 3 4" with 13 16" Hex MSD3731 D3731 MSDs spark plugs are engineered to improve the efficiency of the combustion process to create the most power possible combined with increased durability. The center tip of the plug is made from iridium to promote the best spark and increase resilience. A proprietary ceramic material enhances the dielectric strength of the plug housing