Manufacturer & Part #	Description	Note
AUTOLITE Part # 5224	PLUGS Resistor	GAP .044
AUTOLITE Part # AP5224	PLUGS Platinum	GAP .044
AUTOLITE Part # APP5224	PLUGS Double Platinum	GAP .044
CHAMPION Part # 415	COPPER PLUS (#RN9YC)	{.025 gap}
BOSCH Part # 4230	PLATINUM discontinued (#FR8LPX)	GAP=0.044"; Original equipment is iridium.
BOSCH Part # 4308	PLATINUM+2	Original equipment is iridium.; Do not gap. Gap is not adjustable.
BOSCH Part # 4428	PLATINUM+4	Do not gap. Gap is not adjustable.
BOSCH Part # 7562	SUPER (#FR8LCX)	GAP=0.044"; Original equipment is iridium.
DENSO Part # 5304	Iridium Power (#IK20)	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)
CHAMPION Part # 3415	PLATINUM POWER	OE Style {.025 gap}
ACDELCO Part # 41806	PLATINUM PLUG (#88901012)	SPARK PLUG .044 GAP
CHAMPION Part # 7332	DOUBLE PLATINUM POWER	{.025 gap}
NGK Part # 6994	Premium Iridium Plug (#IZFR6K11, IZFRK)	{.044 gap}
AUTOLITE Part # XP5224	PLUGS Xtreme Performance	OE Style; Gap .044
CHAMPION Part # 9804	CHAMPION IRIDIUM	{.025 gap}
DENSO Part # 3377	Iridium Long Life (#SKJ20DRM11)	O.E. Recommended Iridium Long Life - Patented Iridium Alloy Plug (90% Ir) With Platinum Ground Strap
BOSCH Part # 7962	SUPER PLUS	GAP=0.044"; Original equipment is iridium.
BOSCH Part # 4508	PLATINUM IR FUSION	Original equipment is iridium.; Do not gap. Gap is not adjustable.
BOSCH Part # 4030	PLATINUM PLUS (#4230, FR8LPX)	GAP=0.044"; Original equipment is iridium.