Maserati Quattroporte Spark Plug Replacement

Gap 0.028in OE Type ; Plug Type RN9YC

Non-Resistor Type Gap 0.028in OE Type ; Plug Type N9YC

Resistor Type Gap 0.024in ; Plug Type RN7YC

Gap 0.032 Resistor Plug with Patented U-Groove Design

Gap 0.028" OE Equivalent Design

Gap 0.028"

Gap 0.028"

Gap 0.040 Platinum TT - Twin-Tip Technology Design with Platinum Center Electrode and Titanium Enhanced Ground Strap

Gap 0.028in; Plug Type RN9PYP

Non-Resistor Type Recommended for Racing Purposes Only Gap 0.028in ; Plug Type G59C

Gap 0.028in; Plug Type RN8WYPB3

Gap 0.028"

Gap 0.044 Iridium Power - Performance Upgrade with World's Smallest Center Electrode (0.4 mm Dia.) & Tapered Tip Patented U-Groove Design & Patented Ir Alloy (90% Ir)

Gap 0.040 Iridium TT - Ultimate Endurance and Power, 0.4mm Iridium and 0.7mm Platinum Twin-Tip Technology

Gap 0.028" Actual OE Manufacturer

Gap 0.028" Actual OE Manufacturer

Gap 0.024" Actual OE Manufacturer; OE Spark Plug Is High Ignitability. For Optimal Performance, Replace With High Ignitability Spark Plugs. 37,500 mi OE Mfr Recommended Service Interval