Chevrolet Silverado 1500 HD Spark Plug Replacement

Gap 0.040in; Plug Type RS12YC

Gap 0.040"

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

Gap 0.040in; Plug Type RS14PMC4

Gap: .040/1.0mm Enhanced Tapered Ground Electrode w/ Platinum Chip

Gap 0.040"

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

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

Gap .040 (in)

Gap 0.040in; Plug Type RS14PMP4

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

Gap 0.040in OE Type ; Plug Type RS12WMPB4

Gap 0.040"

GM Original Equipment Double Platinum; Gap 0.040in

Gap .040 (in)

Gap 0.040 DENSO is O.E. Manufacturer / Iridium Long Life Plug - Patented Iridium Alloy Plug (90% Ir) with Platinum Ground Strap OE

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"

Gap 0.040" OE Equivalent Design 100,000 mi OE Mfr Recommended Service Interval

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

Gap .040 (in)

Gap 0.040"

14mm Thread; .708 in. Reach; Heat Range 6; 4 Pack;0.060 in. Plug Gap

14mm Thread; .708 in. Reach; Heat Range 6; 8 Pack;0.060 in. Plug Gap