HKS Adjustable Cam Gear (Slide Cam Pulley) | 4A-GE & 4A-GZE 16V (AE86, AW11, AE92)

HKS Adjustable Slide Cam Pulley

For Toyota 4A-GE & 4A-GZE Engines – AE86, AW11, AE92 & AE101 Applications

Overview

The HKS Adjustable Slide Cam Pulley provides precise camshaft timing adjustment for Toyota 4A-GE and 4A-GZE engines, allowing valve timing to be advanced or retarded to suit different camshafts, engine combinations, and tuning goals.

The pulley is machined from lightweight A2014 duralumin and uses nickel-plated gear teeth for increased surface hardness and wear resistance. Compared with the previous HKS design, the updated material provides approximately 50% greater strength and 30% greater hardness, making it well suited to high-RPM engines and reinforced timing belts.

Adjustment is provided across a ±20° crank-angle range, with each graduation representing approximately 2° of crankshaft angle. The center position corresponds to approximately the same timing phase as the factory cam pulley.

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-style cam timing
• Suitable for intake or exhaust camshaft use on applicable engines
• Lightweight A2014 duralumin construction
• Approximately 50% greater material strength and 30% greater hardness than the previous HKS design
• Nickel-plated gear teeth for increased surface hardness and wear resistance
• Suitable for factory and reinforced timing belts
• Ideal for stock or aftermarket camshaft timing adjustment

Cam Timing Adjustment

Adjustable cam timing allows the installed camshaft position to be changed relative to the crankshaft. This is particularly useful when installing aftermarket camshafts, correcting cam timing after engine machining, or tuning the engine's power and torque characteristics.

The pulley provides approximately 40° of total crank-angle adjustment, from 20° retard to 20° advance. Each adjustment mark corresponds to approximately 2° of crankshaft angle, allowing small, repeatable timing changes.

Camshaft timing directly affects valve events and engine operation, so timing adjustments should be verified carefully during installation and final engine tuning.

Vehicle Fitment

Toyota Corolla Levin / Sprinter Trueno

• 1983–1987 Toyota Corolla Levin / Sprinter Trueno – 5th Gen (AE86) – 4A-GE
• 1987–1991 Toyota Corolla Levin / Sprinter Trueno – 6th Gen (AE92) – 4A-GE / 4A-GZE
• 1991–1995 Toyota Corolla Levin / Sprinter Trueno – 7th Gen (AE101) – 4A-GZE
• 1991–1995 Toyota Corolla Levin / Sprinter Trueno – 7th Gen (AE101) – 4A-GE 20-Valve – Exhaust Side Only

Toyota MR2

• 1984–1986 Toyota MR2 – 1st Gen (AW11) – 4A-GE
• 1986–1989 Toyota MR2 Supercharged – 1st Gen (AW11) – 4A-GZE

Fitment Notes

• Fits Toyota 4A-GE and 4A-GZE engines
• Designed for intake and exhaust camshaft positions on applicable 16-valve engines
• Not compatible with the intake side of 5-valve / 20-valve 4A-GE engines
• 20-valve applications are therefore exhaust-camshaft only
• Suitable for standard camshafts and applicable aftermarket camshafts
• Camshaft timing must be properly verified after installation
• Professional installation and engine tuning are recommended

Product Specifications

Brand: HKS
Product Type: Adjustable Cam Pulley
Engine: Toyota 4A-GE / 4A-GZE
Material: A2014 Duralumin
Gear Tooth Finish: Nickel Plated
Adjustment Range: ±20° Crank Angle
Adjustment Graduation: Approximately 2° Crank Angle per Mark
Camshaft Position: Intake / Exhaust as Applicable
Timing Drive: Timing Belt
Installation: Adjustable Replacement Cam Pulley

What's Included

• (1) HKS Adjustable Slide Cam Pulley

One pulley controls one camshaft. Two pulleys are required when replacing both the intake and exhaust cam gears on a compatible twin-cam application.