18mm - .4375 in Reach - Tapered Seat - Single Pack

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MSD's spark plugs are engineered to improve the efficiency of the combustion process to create the most power possible combined with increased durability. The center tip of the plug is made from iridium to promote the best spark and increase resilience. A proprietary ceramic material enhances the dielectric strength of the plug housing forcing the spark, even under extreme cylinder pressures, to jump across the plug gap to the ground electrode. This electrode is machined to expose more spark to the incoming gases to promote the most effective combustion event possible.

• Proprietary plug design inside and out
• Designed for use on high performance vehicles that utilize high output ignition systems
• Machined electrode increases exposure to the flame to improve combustion
• MSD’s proprietary ceramic formula provides the highest dielectric strength
• Yttrium ground electrode reduces the chance of pre-ignition
• Iridium tip improves cold starts
• All spark plugs tested prior to packaging and shipping
• Unique insulator design improves spark isolation
• Lower voltage Requirements for longer coil life

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Information:

Holley Performance Emission Code 2: This part is legal for sale and use on Emissions Controlled Vehicles when used in accordance with the manufacturers application guide because it is a direct or consolidated replacement part. The following vehicles are considered Emissions Controlled Vehicles: 1966 and newer U.S. manufactured California Certified vehicles/1968 and newer U.S. manufactured Federally Certified vehicles/1968 and newer Foreign manufactured vehicle

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Application Summary:

Year	Make/Model
1994-1995	Dodge Ram 3500
1963	Ford 300
1966-1974	Ford Bronco
1980-1989	Ford Bronco
1991-1992	Ford Bronco
1955-1959	Ford Club
1962	Ford Club Wagon
1964-1967	Ford Club Wagon
1955-1974	Ford Country Sedan
1955-1974	Ford Country Squire
1955-1960	Ford Courier Sedan Delivery
1957	Ford Custom
1964-1972	Ford Custom
1958-1960	Ford Custom 300
1968-1974	Ford Custom 500
1955-1956	Ford Customline
1957-1958	Ford Del Rio Wagon
1969-1983	Ford E-100 Econoline
1975-1983	Ford E-100 Econoline Club Wagon
1975-1980	Ford E-150 Econoline
1982-1989	Ford E-150 Econoline
1991-1996	Ford E-150 Econoline
1975-1980	Ford E-150 Econoline Club Wagon
1982-1989	Ford E-150 Econoline Club Wagon
1969-1974	Ford E-200 Econoline
1975-1989	Ford E-250 Econoline
1991-1996	Ford E-250 Econoline
1977-1980	Ford E-250 Econoline Club Wagon
1983-1989	Ford E-250 Econoline Club Wagon
1969-1974	Ford E-300 Econoline
1991-1996	Ford E-350 Econoline
1961-1967	Ford Econoline
1957-1958	Ford F-100
1964-1983	Ford F-100
1975-1989	Ford F-150
1991-1996	Ford F-150
1961-1989	Ford F-250
1991-1996	Ford F-250
1975-1989	Ford F-350
1991-1996	Ford F-350
1955-1970	Ford Fairlane
1978-1983	Ford Fairmont
1960-1970	Ford Falcon
1961-1965	Ford Falcon Sedan Delivery
1959-1967	Ford Galaxie
1962-1967	Ford Galaxie 500
1972	Ford Gran Torino
1975-1982	Ford Granada
1965-1983	Ford LTD
1970-1977	Ford Maverick
1964-1973	Ford Mustang
1979-1982	Ford Mustang
1974	Ford Mustang II
1956	Ford Park Lane Wagon
1971-1974	Ford Pinto
1955-1974	Ford Ranch Wagon
1957-1974	Ford Ranchero
1976-1978	Ford Ranchero
1955-1959	Ford Skyliner
1963-1964	Ford Sprint
1960	Ford Starliner
1955-1960	Ford Sunliner
1955-1973	Ford Thunderbird
1980-1982	Ford Thunderbird
1968-1974	Ford Torino
1955-1960	Ford Victoria
1952-1959	Lincoln Capri
1958-1972	Lincoln Continental
1952-1954	Lincoln Cosmopolitan
1955	Lincoln Custom
1960	Lincoln Lincoln Series
1956-1957	Lincoln Mark II
1968-1971	Lincoln Mark III