NGK 6987 Spark Plug

NGK V-Power Spark Plug 6987 Overview

The NGK V-Power Spark Plug 6987 is an OE-style ignition component built around NGK’s long-standing role as a major original equipment supplier in North America. It uses a copper core with a nickel center electrode tip, a standard ground electrode design, and a 0.044 in. pre-gap for direct replacement service on a wide range of Chrysler, Dodge, Jeep, Ram, and Acura applications.

For drivers servicing a Dodge Ram 1500, Jeep Grand Cherokee, or Dodge Dakota, this plug is specified to match factory-style ignition requirements and maintain consistent spark performance. Part number 6987 is also identified as NGK ZFR6F-11G.

Key Features

• NGK V-Power Spark Plug line for OE-style secondary ignition service
• Copper core center and ground electrodes for stable heat transfer
• Nickel center electrode tip with standard ground configuration
• 0.044 in. pre-gap for listed applications
• 5 k? resistance for ignition system noise control
• 14 mm thread diameter, 0.75 in. reach, flat seat, 5/8 in. hex
• Manufacturer heat range 6
• Part number 6987, NGK ZFR6F-11G

Product Details

NGK built this V-Power spark plug for vehicles that call for a flat-seat, 14 mm plug with a 0.75 in. reach and a 0.044 in. gap. The copper core construction supports efficient heat dissipation, while the nickel-tipped center electrode and standard ground electrode layout are selected for dependable ignition service in everyday driving. This part cross-references Mopar SPZFR6F11G for the same application.

Compatible vehicle coverage includes 2013 Ram 1500, 2011-2012 Jeep Liberty, 2011-2012 Ram 1500, 2011 Dodge Nitro, 2011 Ram Dakota, 2004-2010 Dodge Dakota, 2007-2010 Dodge Nitro, 2002-2010 Dodge Ram 1500, 2006-2010 Jeep Commander, 2005-2010 Jeep Grand Cherokee, 2002-2010 Jeep Liberty, 2004-2009 Dodge Durango, 2006-2009 Mitsubishi Raider, 2007 Chrysler Aspen, 2000-2007 Dodge Durango, 2002-2007 Dodge Ram 1500, 2006-2007 Jeep Commander, 1999-2007 Jeep Grand Cherokee, 1997-2003 Dodge Ram 2500, 1997-2003 Dodge Ram 3500, 2003 Acura EL, and 2001-2002 Acura EL.

What It Helps Address

• Rough idle caused by worn spark plugs
• Hard starting from weakened ignition output
• Misfire conditions tied to incorrect plug gap or electrode wear
• Reduced throttle response from inconsistent spark delivery
• Service replacement for factory-specified ignition maintenance intervals

Installation Notes and Tips

Verify the engine application against the listed fitment before installation. Confirm the plug gap matches the vehicle specification; several listed applications call for 0.044 in., while some Acura EL applications require a different gap setting. Use the correct 5/8 in. spark plug socket, thread the plug by hand first, and torque to the vehicle manufacturer’s specification.

Quality Assurance

NGK is a major OE spark plug supplier with more than 80 years of automotive manufacturing experience and broad coverage across domestic and import vehicles. The brand’s OE-focused production standards and North American distribution network support consistent part quality for service replacement use.