SPARK PLUG W16EXR-U (3031)

Denso U-Groove spark plugs feature a u-shaped groove in the ground electrode, giving the flame a groove to grow in, resulting in less flame dissipation and a larger flame front for a more complete combustion. This translates to better fuel efficiency and improved throttle response. Machine rolled threads prevent seizing or cross threading during installation and removal. 100% pre-fired to assure the highest quality possible. Purified alumina powder insulator provides exceptional strength and thermal conductivity. Five rib insulator prevents flashover. Copper-glass seal bonds center electrode and insulator for a gas-tight seal.

PRODUCT SPECIFICATIONS:

Shell:

• Thread Diameter14mm
• Thread Pitch1.25mm
• Seat Type Gasket
• Reach19mm (3/4″)
• Hex Size13/16″ (21mm)
• Terminal Type Removable Nut
• Overall, Height JIS
• Gap.031″ (0.8mm)

Center Electrode:

• Material Nickel
• Type Standard
• Size2.5mm
• Projection Extended Projection

Ground Electrode

• Material Nickel
• Type-Groove
• Quantity1

Specifications

• Resistor Yes
• Resistor Value5k Ohm
• Heat Range16
• Torque Specs Cast Iron: 26-30 lb. ft. Aluminum: 15-22 lb. ft.

Part Information

• BrandDenso
• Warranty12 Months
• Longevity20-30k Miles