Porsche 928 Spark Plug Replacement

Gap 0.028in OE Type ; Plug Type RN12YC

Gap 0.028in OE Type ; Plug Type RN9YC

Original Center Electrode Material is Copper/Nickel

Original Center Electrode Material is Silver

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

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

Gap 0.028" OE Equivalent Design

Gap 0.028"

Gap 0.028"

Gap 0.028" OE Equivalent Design

Gap 0.028"

Original Center Electrode Material is Silver

WR7DC

Gap 0.028"

WR7DC

WR7DC

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

Gap 0.028in; Plug Type RN9PYP

Gap 0.028in; Plug Type RN14PYP

Gap 0.028in; Plug Type RN8WYPB3

Gap 0.028"

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

WR7DC