HKS Adjustable Cam Gear | 4A-GE / 4A-GZE 16V (AE86 Corolla / AW11 MR2 / AE92 Corolla)

HKS Adjustable Slide Cam Pulley

For 1983–1987 Toyota Corolla AE86, 1984–1989 Toyota MR2 AW11, and 1987–1991 Toyota Corolla AE92 coupe equipped with 4A-GE / 4A-GZE 16V camshaft and timing-belt systems.

Overview

The HKS Adjustable Slide Cam Pulley allows precise camshaft timing adjustment on 4A-GE / 4A-GZE 16V engines in 1983–1987 Corolla AE86, 1984–1989 MR2 AW11, and 1987–1991 JDM Corolla AE92 coupes and 1988–1991 U.S.-Market Corolla GT-S AE92 coupes. Moving the cam timing forward or backward relative to the crankshaft allows the installed valve timing to be set for factory or aftermarket camshafts, engine machining changes, and performance tuning.

The pulley uses lightweight A2014 duralumin construction with a nickel-plated gear section for increased surface hardness and wear resistance. The center adjustment position corresponds to the factory cam-pulley phase, while the graduated scale allows repeatable advance or retard adjustments.

Key Features

• Adjustable camshaft timing for Toyota 4A-GE and 4A-GZE engines
• ±20° crank-angle adjustment range
• Approximately 2° of crank angle per graduation
• Center position corresponds to factory cam timing
• Suitable for intake or exhaust camshaft use on supported 16-valve applications
• Lightweight A2014 duralumin construction
• Nickel-plated gear section for increased surface hardness and wear resistance
• Suitable for use with standard or reinforced timing belts
• One pulley controls one camshaft

Vehicle Fitment

Toyota Corolla — AE86

• 1983–1987: Trueno (JDM) / 4A-GE 16V
• 1983–1987: Levin (JDM) / 4A-GE 16V
• 1985–1987: GT-S (U.S.-Market) / 4A-GE 16V

Toyota MR2 — AW11 / MK1

• 1984–1989: JDM / 4A-GE 16V
• 1985–1989: U.S.-Market / 4A-GE 16V
• 1986–1989: JDM Supercharged / 4A-GZE 16V
• 1988–1989: U.S.-Market Supercharged / 4A-GZE 16V

Toyota Corolla / Sprinter — AE92 — Coupe

• 1987–1991: Japanese-market Corolla Levin and Sprinter Trueno, 4A-GE / 4A-GZE 16V.
• 1988–1991: GT-S coupe (U.S.-Market) / 4A-GE 16V

Camshaft Position: Intake or exhaust on the listed 16-valve engine configurations.

Fitment Notes

• Engine-swapped vehicles require the compatible 4A-GE / 4A-GZE 16V camshaft and timing system; chassis identity alone does not establish fitment.
• Factory AE86 SR5 4A-C and AE92 SR5 4A-F / 4A-FE engines are not covered.
• Not compatible with the intake side of 20-valve 4A-GE engines.
• Developed for closed-course competition use.

Product Specifications

Brand: HKS
Product Type: Adjustable Cam Gear / Slide Cam Pulley
Engine: Toyota 4A-GE / 4A-GZE 16V
Material: A2014 Duralumin
Gear Finish: Nickel Plated
Adjustment Range: ±20° Crank Angle
Graduation: Approximately 2° Crank Angle per Mark
Camshaft Position: Intake / Exhaust
Timing Drive: Timing Belt
Valve Train: DOHC

Supporting Engine Components

The HKS Fine Tune Timing Belt provides a reinforced belt option for the compatible 4A-GE / 4A-GZE 16-valve timing systems.

Available Configurations

Choose one gear for a single camshaft or a pair for both camshafts.

Quantity

• Single Unit (1 Gear): (1) HKS adjustable cam gear for one camshaft.
• Complete Engine Set - Pair (2 Gears): (2) HKS adjustable cam gears for the intake and exhaust camshafts on the supported 16-valve engine.