14mm Thread - .691 in Reach - Tapered Seat - 4 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
1997-1999	Audi A8
1992-1994	Audi V8 Quattro
2010-2013	Cadillac CTS
2006-2009	Chevrolet Corvette
2011-2013	Chevrolet Corvette
1996-2005	Ford Crown Victoria
2005	Ford Escape
1999	Ford F-150
2002-2004	Ford F-150
2004	Ford F-150 Heritage
2003-2010	Ford Focus
2005-2006	Ford GT
2003-2004	Ford Mustang
2007-2012	Ford Mustang
1997-2000	Ford Ranger
1999	Ford Taurus
2003-2006	Ford Taurus
2003-2006	Jaguar S-Type
2002-2006	Jaguar X-Type
2004-2005	Mazda 3
1997-2000	Mazda B4000
2001	Mercury Sable
2003-2005	Mercury Sable