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DENSO 4221 U-Groove Standard Spark Plug

(Ford Mustang 2012; Chevrolet Camaro 2010-15; Mercedes-Benz E350 2014, E550 2014-15, 2017, E400 2014-15, 2017, E250 2014-15; Kia Optima 2011-14 + 14 more models)

Manufacturer

Picture for manufacturer DENSO

Part Number

4221
7 reviews
Sale Price

$6.91

In Stock (5)

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Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The DENSO 4221 is a standard spark plug engineered with advanced U-Groove technology to deliver superior ignition performance and engine efficiency. This spark plug is designed to provide reliable starting and smooth operation across a wide range of operating conditions.

Key Features:

  • U-Groove ground electrode design concentrates spark energy for improved ignitability
  • Enhanced combustion efficiency helps optimize fuel economy and reduce emissions
  • Copper core construction provides excellent heat dissipation and thermal conductivity
  • Durable nickel-plated shell resists corrosion and seizure
  • Precision-engineered insulator prevents flashover and misfires
  • OE-quality construction meets or exceeds original equipment specifications

DENSO's U-Groove design features a unique ground electrode configuration that focuses the spark at the edge of the electrode, creating a more efficient flame kernel and better combustion. This results in improved throttle response, smoother idle, and reduced fouling compared to conventional spark plug designs.

Products specifications

Fits

Ford Mustang 2012; Chevrolet Camaro 2010-15; Mercedes-Benz E350 2014, E550 2014-15, 2017, E400 2014-15, 2017, E250 2014-15; Kia Optima 2011-14; Cadillac Allante 1993; Suzuki LT-A500F Vinson 500 4x4 Auto 2007 + 12 more models

Manufacturer Heat Range

20

Ground Electrode Core Material

Nickel

Seat Type

FLAT

Center Electrode Tip Material

Nickel

Pre-Gap Size

0.8

Ground Electrode Quantity

1

Ground Configuration

Standard

Center Electrode Core Material

Copper

Ground Electrode Tip Design

Standard

Thread Diameter

14.00

Resistance

5000

Reach

19.00

Hex Size

16.0

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