14mm - .984 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
2005-2008	Chrysler 300
2012-2014	Chrysler 300
2007-2008	Chrysler Aspen
2001-2010	Chrysler PT Cruiser
2004	Chrysler Sebring
2001-2003	Chrysler Voyager
2001-2007	Dodge Caravan
2011-2020	Dodge Challenger
2006-2008	Dodge Charger
2012-2020	Dodge Charger
2004-2008	Dodge Durango
2006-2008	Dodge Magnum
2003-2008	Dodge Ram 1500
2003-2008	Dodge Ram 2500
2003-2008	Dodge Ram 3500
2006-2008	Jeep Commander
2005-2008	Jeep Grand Cherokee
2012-2020	Jeep Grand Cherokee
2002-2005	Jeep Liberty
2003	Jeep TJ
2005-2006	Jeep TJ
2019	Ram 2500