AE86 NGK Spark Plug Set | 4A-C (1984-87 Corolla)

NGK V-Power / Iridium IX Spark Plug Set

For 1984–1987 U.S.-Market Corolla Sport AE86 (SR5) with 4A-C

Overview

This NGK Spark Plug Set provides two ignition options for 1984–1987 Toyota Corolla Sport SR5 AE86 models equipped with the carbureted 1.6L 4A-C SOHC engine.

Choose V-Power Nickel for a conventional OE-style replacement using NGK's V-groove electrode design, or upgrade to Iridium IX for a fine-wire iridium center electrode with increased wear resistance and strong, consistent ignitability.

Both options use the correct 4A-C spark-plug dimensions, NGK heat range 5, resistor construction, and factory pre-gapped 1.1 mm / 0.044 in. electrodes, making the choice primarily a matter of conventional nickel versus premium iridium electrode technology.

Key Features

• Designed for 1984–1987 AE86 4A-C applications

• Choice of V-Power Nickel or Iridium IX

• Complete set of 4 spark plugs

• NGK heat range 5

• Resistor-type construction

• M14 x 1.25 thread

• 19 mm / 0.750 in. thread reach

• Gasket-style seat

• Factory pre-gapped to 1.1 mm / 0.044 in.

• Projected-tip design

Vehicle Fitment

Toyota Corolla AE86

• 1984–1987 SR5 (U.S.-Market) — 4A-C, manual or automatic transmission

Fitment Notes

• 1.6L 4A-C SOHC engine applications
  

• Four spark plugs are required for a complete engine replacement

• Specified spark-plug gap is 1.1 mm / 0.044 in.

• Does not apply to 4A-GE-powered Corolla Sport GT-S models

Product Specifications

Brand: NGK
Product Type: Spark Plug Set
Engine: 1.6L 4A-C SOHC
Engine Type: Carbureted Inline-4
Heat Range: 5
Thread Size: M14 x 1.25
Thread Reach: 19 mm / 0.750 in.
Seat Type: Gasket
Factory Pre-Gap: 1.1 mm / 0.044 in.
Hex Size: 13/16 in. / approximately 20.8 mm
Resistor Type: Yes
Quantity: 4 Spark Plugs
Available Electrode Types: Nickel V-Power / Iridium IX

Which Spark Plug Is Right for You?

V-Power Nickel — Best for Affordable Daily Driving & Factory-Style Maintenance

Choose V-Power Nickel if you drive your AE86 SR5 regularly, are restoring it to stock condition, or simply want dependable spark plugs at the lowest cost. It is our value choice for routine tune-ups when you are comfortable with conventional replacement intervals.

Iridium IX — Best for Longer Plug Life & Spirited Driving

Choose Iridium IX if you want to replace your spark plugs less often or enjoy spirited driving and prefer NGK’s performance-oriented ignition design. It typically lasts longer than V-Power Nickel, but is not a guaranteed horsepower or throttle-response upgrade over fresh, correctly working nickel plugs.

Prefer DENSO? The AE86 DENSO Spark Plug Set offers Standard U-Groove for affordable factory-style maintenance and Iridium TT for a premium, longer-wearing alternative for the same stock 4A-C SR5 application.

Our Recommendation: Choose V-Power Nickel for most stock or restored SR5s when affordable everyday maintenance matters most. Choose Iridium IX if you want longer typical plug life or prefer its performance-oriented design for spirited driving.

Available Configurations

V-Power Nickel

• (4) NGK V-Power spark plugs

Iridium IX

• (4) NGK Iridium IX spark plugs