Mercury Grand Marquis Spark Plug Replacement

Original Center Electrode Material is Copper/Nickel Gap 0.044 in

Gap 0.044in; Plug Type RS9YC

Gap 0.044in OE Type ; Plug Type RV15YC4

Gap 0.044in OE Type ; Plug Type RV17YC

Gap 0.050in OE Type ; Plug Type RS14LC

Gap 0.054in; Plug Type RS12YC

Gap 0.044 O.E. Recommended Resistor Plug with Patented U-Groove Design

Gap 0.044 O.E. Recommended Resistor Plug with Patented U-Groove Design

Gap 0.060 O.E. Recommended Resistor Plug with Patented U-Groove Design

Gap 0.035 O.E. Recommended Resistor Plug with Patented U-Groove Design

Gap 0.044 O.E. Recommended Resistor Plug with Patented U-Groove Design

Gap 0.032 O.E. Recommended Resistor Plug with Patented U-Groove Design

Gap 0.035 O.E. Recommended Resistor Plug with Patented U-Groove Design

Gap 0.060 Resistor Plug with Patented U-Groove Design

Gap 0.044" OE Equivalent Design

Gap 0.050" OE Equivalent Design

Gap 0.050" OE Equivalent Design 30,000 mi OE Mfr Recommended Service Interval

Gap 0.054" OE Equivalent Design 30,000 mi OE Mfr Recommended Service Interval

Gap 0.054in; Plug Type RS10PYC

Gap 0.050in; Plug Type RS14ZPYC5

.050 Gap OE half thread design replaced by full thread design Use until inventory is depleted

Original Center Electrode Material is Copper/Nickel Do Not Gap, Gap is Preset

Gap 0.054in; Plug Type RS10PYC4

Gap 0.044in; Plug Type RV17PMC4

Obsolete; OE half thread design replaced by full thread design .050"/1.3mm

Original Center Electrode Material is Copper/Nickel Do Not Gap, Gap is Preset

OE Style; Auto

Gap 0.054"

Gap 0.044"

Gap 0.050"

Gap 0.050"

Gap 0.044"

Original Center Electrode Material is Copper/Nickel Do Not Gap, Gap is Preset

California; Gap: .060 Enhanced Tapered Ground Electrode w/ Platinum Chip

Original Center Electrode Material is Platinum Do Not Gap, Gap is Preset

Gap: .044 Enhanced Tapered Ground Electrode w/ Platinum Chip

Gap: .054/1.4mm Enhanced Tapered Ground Electrode w/ Platinum Chip

Gap: .044 Enhanced Tapered Ground Electrode w/ Platinum Chip

Gap: .044/1.1mm Enhanced Tapered Ground Electrode w/ Platinum Chip

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

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

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

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

Gap 0.044in; Plug Type RV17PMP4

Gap 0.050in; Plug Type RS14ZPYPB

Original Center Electrode Material is Copper/Nickel Do Not Gap, Gap is Preset

Original Center Electrode Material is Platinum Do Not Gap, Gap is Preset

Original Center Electrode Material is Copper/Nickel Do Not Gap, Gap is Preset

Original Center Electrode Material is Platinum Do Not Gap, Gap is Preset

Gap 0.044in; Plug Type RS9PYP4

Original Center Electrode Material is Platinum Do Not Gap, Gap is Preset

Gap .044 (in); Auto

Gap 0.054in; Plug Type RS12PYPB5

Gap 0.044in; Plug Type RS8WYPB5

Gap 0.054in; Plug Type RS12WYPB4

Original Center Electrode Material is Copper/Nickel Do Not Gap, Gap is Preset

Original Center Electrode Material is Copper/Nickel Do Not Gap, Gap is Preset

Original Center Electrode Material is Copper/Nickel Do Not Gap, Gap is Preset

Original Center Electrode Material is Platinum Do Not Gap, Gap is Preset

Original Center Electrode Material is Platinum Do Not Gap, Gap is Preset

Gap 0.050 O.E. Recommended Double Platinum Plug - Extra Long Life Double Platinum Plug with Platinum Ground Strap

Gap 0.044"

Gap 0.044"

Gap 0.050"

Gap 0.050"

Gap 0.054"

Gap 0.050in; Plug Type RS14WLPB5

Gap .054 (in)

Gap 0.044 Iridium Long Life - Patented Iridium Alloy Plug (90% Ir) with Platinum Ground Strap

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

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 0.044 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 0.044 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 .044 (in)

Gap 0.054"

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

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

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

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

FFV and/or CNG Fuel Conversions Gap 0.044" OE Equivalent Design

Gap 0.054"

Gap 0.044"

Gap 0.054"

14mm Thread; .460 in. Reach; Heat Range 6; Each;0.044 in. Plug Gap

Single; Plug Type 6IR4Y; [Available While Supplies Last];0.035 in. Plug Gap Available While Supplies Last

14mm Thread; .708 in. Reach; Heat Range 6; 4 Pack;0.054 in. Plug Gap

Standard; Shorty Plug For Headers; 4 Pack;0.044 in. Plug Gap

14mm Thread; .460 in. Reach; Heat Range 6; Tapered Seat; 5/8 Hex; Projected Tip; Resistor; 4 Pack;0.043 in. Plug Gap

14mm Thread; .708 in. Reach; Heat Range 6; 8 Pack;0.054 in. Plug Gap

14mm Thread; .460 in. Reach; Tapered Seat; 5/8 Hex; Projected Tip; Resistor; 2 Of PN[0576S-4]; 8 Pack;0.044 in. Plug Gap

Stock Heat Range; 0.032 in. Gap; 5/8 in. Hex Size; .460 in. Reach; Resistor; Tapered Seat Type; 1.25mm Thread Pitch; 14mm Thread Size; 8 Pack Of PN[0576];0.044 in. Plug Gap