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DENSO 4013 W16EX-U Standard U-Groove Copper Spark Plug

(Chevrolet Corvette 1980-81; Toyota Supra 1993; Buick Skylark 1996-97; Mercedes-Benz E53 AMG 2019; Pontiac Phoenix 1977-79 + 8 more models)

Part of: DENSO Spark Plug

Other options in this family: DENSO 5047 DENSO 3531 DENSO 999-170-238-90 DENSO 3122 DENSO 5027

Manufacturer

Picture for manufacturer DENSO

Part Number

4013
8 reviews
Sale Price

$3.91

In Stock (10+)

delivery box

Usually delivered within 2 days

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Live-in-stock inventory

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Fitment guaranteed

Fitment guaranteed

Product Details

The DENSO 4013 (W16EX-U) is a standard replacement spark plug engineered with DENSO's patented U-Groove ground electrode design. By removing material from the center of the ground electrode, the U-Groove exposes more of the spark to the air-fuel mixture, improving ignitability and combustion efficiency compared to a conventional flat-tip electrode.

Key Features:

  • U-Groove Ground Electrode — Enhances flame kernel growth for more complete combustion and improved fuel efficiency
  • Copper Core Center Electrode — Provides excellent thermal conductivity and reliable heat dissipation
  • Standard Heat Range — Designed for OEM replacement performance in compatible applications
  • Nickel Alloy Construction — Delivers durability and consistent spark performance over a standard service interval
  • Pre-Gapped from Factory — Ready for installation right out of the box

The DENSO 4013 is a direct OEM-style replacement plug suitable for routine tune-ups, delivering dependable ignition performance. DENSO's U-Groove technology has been a hallmark of their standard plug lineup, balancing everyday reliability with improved ignitability over traditional electrode designs.

Products specifications

Fits

Chevrolet Corvette 1980-81; Toyota Supra 1993; Buick Skylark 1996-97; Mercedes-Benz E53 AMG 2019; Pontiac Phoenix 1977-79; Yamaha PW50 1981-2006, 2008; Ford Model T 1926-27; Honda NA50 1979-81, NC50 1977-81; Suzuki ALT50 1983-84 + 3 more models

Pre-Gap Size

0.7

Ground Electrode Core Material

Nickel

Seat Type

FLAT

Center Electrode Tip Material

Nickel

Ground Electrode Quantity

1

Manufacturer Heat Range

14

Ground Configuration

Standard

Center Electrode Core Material

Copper

Thread Diameter

14.00

Ground Electrode Tip Design

U-Groove

Reach

12.70

Hex Size

20.6

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Fast Shiping Good Services Verry Good Pricing

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Easy and fast. Order arrived very fast. Thanks.

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