Mercury Monarch Spark Plug Replacement

Gap 0.044in OE Type ; Plug Type RV15YC4

Gap 0.044in OE Type ; Plug Type RV17YC

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

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

Gap 0.044" OE Equivalent Design

Gap 0.044" OE Equivalent Design

Gap 0.050" OE Equivalent Design

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

Gap 0.044in; Plug Type RV17PMC4

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

OE Style; Auto

Gap 0.044"

Gap 0.050"

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

Gap: .044 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 0.044in; Plug Type RV17PMP4

Gap .044 (in); Auto

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

Gap 0.044"

Gap 0.044"

Gap 0.050"

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

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

Single; Plug Type 16IR5Y; [Available While Supplies Last];0.035 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; .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