NGK SPARK PLUGS DCPR8E 4339 10 PACK

OVERVIEW

Provides precise ignition reliability and combustion support for demanding motorcycle engines. This product is a 10-pack of NGK DCPR8E spark plugs engineered with durable construction materials optimized for consistent performance. Designed specifically for Harley-Davidson motorcycles, it ensures stable spark delivery across varied riding conditions.

ENGINEERING & PERFORMANCE

Features a deep-seated copper core paired with high alumina ceramic insulation to maximize heat dissipation and maintain electrical stability under heavy load. The wide operating heat range effectively prevents electrode fouling during low-speed riding while resisting preignition during aggressive highway cruising. Constructed with a hardened nickel alloy tip, the plug delivers sustained thermal efficiency and reliable ignition cycles throughout its service life.

KEY FEATURES

• 10-pack configuration for complete system refresh
• NGK DCPR8E (part number 4339) specification
• High alumina ceramic insulator shell
• Deep-seated copper core for rapid heat transfer
• Nickel alloy tip construction for extended service intervals
• Wide operating heat range prevents cold-fouling and hot-preignition
• Direct OEM replacement design for seamless installation
• Engineered to handle multiple riding styles and engine outputs

TECHNICAL SPECIFICATIONS

• Brand: NGK
• Part Name: Spark Plugs DCPR8E / 4339
• Component Type: Spark Plug
• Material: High alumina ceramic, deep-seated copper core, nickel alloy tip
• Supported Years: 2004–2016
• Compatible Trims: Fat Boy, Softail Slim, Road Glide, Street Glide, Electra Glide, V-Rod, Road King, Fat Bob, Switchback, Low Rider, and related EFI/non-EFI variants

FITMENT

• Harley-Davidson Fat Boy S (2016)
• Harley-Davidson Softail Slim S (2016)
• Harley-Davidson Road Glide Extra (2010–2015)
• Harley-Davidson Breakout (2013–2016)
• Harley-Davidson Street Glide (2007–2016)
• Harley-Davidson Electra Glide Ultra Classic (2009–2016)
• Harley-Davidson Road King (2004–2016)
• Harley-Davidson V-Rod Muscle (2009–2016)
• Harley-Davidson Fat Bob (2008–2016)
• Harley-Davidson Switchback (2012–2016)
• Harley-Davidson Heritage Classic (2004–2016)
• Harley-Davidson Deluxe (2005–2016)

WHY RIDERS CHOOSE THIS

Riders select this 10-pack of NGK spark plugs because the deep-copper core and advanced ceramic insulator deliver immediate throttle response and consistent combustion across both low-RPM hauling and high-speed riding. The precisely calibrated heat range eliminates common ignition failures caused by carbon buildup or excessive cylinder head temperatures. Installing these direct-fit plugs restores factory-level spark performance, simplifies maintenance scheduling, and keeps large-displacement engines running smoothly under real-world stress.