ACDelco Spark Plug R46N (GM Part #5612828)

$44.99

type: Unknown Type
Vendor: CorvairFarmer

Description:

🔧 Part Overview

  • Part Number: R46N

  • GM Part Number: 5612828

  • Type: Non-resistor copper core spark plug

  • Thread Size: 14mm x 1.25mm

  • Seat Type: Gasket

  • Reach: Approx. 19mm (0.75")

  • Hex Size: 13/16"

  • Terminal: Fixed

  • Electrode Material: Copper core with nickel alloy ground electrode

  • Special Feature: Early NOS variants often feature green rings and knurled shells, known as “ACNITER” plugs

  • Country of Origin: Typically marked “Made in USA”


đźš— Specific Applications

The R46N plug was widely used across:

  • 1960s–1970s Chevrolet Corvette (283, 327, 350, 396, 427, 454 CI engines)

  • GM small-block and big-block V8s in Camaro, Chevelle, Nova, Impala, and full-size models

  • Cadillac DeVille and Eldorado (early 1970s)

  • Marine engines (MerCruiser, OMC)

  • Industrial and agricultural engines

  • Classic hot rods and performance builds using 14mm gasketed heads

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