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NGK 3903 Iridium IX Spark Plug M14x1.25 19mm Reach 1.1mm Gap

(Honda Civic 1981-83, 1985-87, Accord 1985, Prelude 1983-87, Wagovan 1986-87; Dodge Challenger 1978-79, D50 1979-82, Ram 50 1983-93 + 73 more models)

Manufacturer

Picture for manufacturer NGK Spark Plugs

Part Number

3903
5 reviews
Sale Price

$7.92

In Stock (10+)

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Usually delivered within 2 days

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Product Details

The NGK 3903 Iridium IX spark plug is a fine-wire iridium performance spark plug built for drivers who want sharper throttle response, good fuel efficiency and long service life. NGK is a major OE spark plug supplier, and the Iridium IX line is made for the performance enthusiast.

Key Features:

  • Iridium center electrode with a fine-wire design. Iridium is about six times harder than platinum, so the electrode stays durable while needing less voltage to fire.
  • Copper core in the center electrode for heat dissipation and conductivity
  • Taper-cut nickel ground electrode for better ignitability and flame spread
  • Single J-gap ground electrode
  • Resistor design (approx. 5000 ohm) for reduced radio frequency interference
  • Ceramic insulator

Specifications:

  • Thread size: M14 x 1.25 (metric)
  • Thread reach: 19 mm
  • Pre-set gap: 1.1 mm
  • Heat range: 6
  • Seat type: Flat, with crush washer included
  • Terminal: Non-removable nut
  • Insulator height: 56 mm
  • Center electrode projection: Mid projection

Iridium IX plugs are designed to give strong acceleration, efficient combustion and dependable cold starts. They suit performance-minded drivers and anyone looking for an upgrade over standard nickel spark plugs.

Products specifications

Fits

Honda Civic 1981-83, 1985-87, Accord 1985, Prelude 1983-87, Wagovan 1986-87; Dodge Challenger 1978-79, D50 1979-82, Ram 50 1983-93, Colt 1979-91, Raider 1987-89, Power Ram 50 1983-86, Conquest 1984-86, 2000 GTX 1989-90 + 68 more models

Stock Number

3903

Part Number

BPR6EIX-11

Electrical Terminal Type

Non-Removable Nut

Ground Electrode Core Material

Nickel

Hex Size

13/16

Seat Type

FLAT

Manufacturer Heat Range

6

Ground Electrode Quantity

1

Center Electrode Tip Material

Iridium

Ground Configuration

Standard

Center Electrode Core Material

Copper

Pre-Gap Size

.044

Reach

.75

Insulator Height

55.00

Thread Diameter

14.00

Resistance

5000

Ground Electrode Tip Design

Taper Cut

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