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Denso

Denso 4221 Spark Plug

Part # 4221
Item # 1002HEVL
$13.99
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90 days free return

Specifications

Brand
Denso
Warranty
3-Year
Item Located
United States
Quantity
1
Center Electrode Core Material
Copper
Center Electrode Tip Material
Nickel
Ground Configuration
Standard
Ground Electrode Core Material
Nickel
Ground Electrode Quantity
1
Ground Electrode Tip Design
Standard
Hex Size (mm)
16.0
Manufacturer Heat Range
20
Pre-Gap Size (mm)
0.8
Reach (mm)
19
Resistance (ohms)
5000.0
Seat Type
Flat
Thread Diameter (mm)
14.00
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Features

Denso 4221 Spark Plug, manufactured with precision and meeting OEM quality standards, is a trusted name in the automotive aftermarket, delivering reliable performance for your vehicle.
  • Minimizes heat interference, ensuring maximum firing potential.
  • Designed with an advanced electrode for more efficient ignition.
  • Recognized as one of the best spark plugs available for superior reliability.
  • Backed by Denso's commitment to high-quality automotive engineering and performance.
  • Improves horsepower, torque, and fuel economy for better engine efficiency.

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Specifications

Part interchange

Part numbers listed below indicate interchangeable parts. These parts share the same size, parameter, function and compatibility. However, please note that items from different brands may have minor variations.
4221, 42-21 - NAPA, NGK, BOSCH, DENSO AUTO PARTS
U20ESRN, U20ESR-N - DENSO AUTO PARTS

Compatibility

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This part is compatible with (13)vehicles
All
Arctic Cat
Suzuki
1999 - 2003Arctic Cat400 2x4
1999 - 2003Arctic Cat400 4x4
1999 - 2006Arctic Cat500 4x4
2002 - 2002Arctic Cat375 Auto 2x4
2002 - 2002Arctic Cat375 Auto 4x4
2006 - 2006Arctic Cat700 EFI 4x4 Auto SE
2007 - 2007Arctic Cat700 EFI 4x4 Auto LE
2008 - 2008Arctic Cat700 EFI 4x4 Auto M4
2003 - 2003SuzukiLT-F500F Vinson 500 4x4
2007 - 2007SuzukiLT-A450X KingQuad AXi 4x4
2007 - 2007SuzukiLT-A500F Vinson 500 4x4 Auto
2007 - 2007SuzukiLT-F500F Vinson 500 4x4
2008 - 2009SuzukiLT-A750X KingQuad AXi 4x4

Highlights

Note detail

Shipping and warranty

  • Fast shipping

    The order will be dispatched within 1 business day, and the package will arrive within your order's estimated date. Please click Shipping Policy for more details.

  • Easy return

    Every order comes with a 90-day free return which means you don't have to pay for a return slip. Please click Return Policy for more details.

  • Warranty policy

    All parts are quality-tested to meet the top-tier aftermarket standards. Please click Warranty Policy for more details.

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