HKS Fine Tune Timing Belt | 4A-GE / 4A-GZE 16V (AE86 Corolla / AW11 MR2 / AE92 Corolla / AE101 Corolla)

HKS Fine Tune Timing Belt

For 1983–1987 Toyota Corolla AE86, 1984–1989 Toyota MR2 AW11, 1987–1991 Toyota Corolla AE92 coupe, and 1991–1995 Toyota Corolla AE101 equipped with the 4A-GZE, all equipped with 4A-GE / 4A-GZE 16V timing systems using a 113R19.1 belt.

Overview

The HKS Fine Tune Timing Belt is a performance-oriented replacement for 4A-GE / 4A-GZE 16-valve timing systems using a 113R19.1 belt. Applications include 1983–1987 JDM Corolla AE86, 1985–1987 U.S.-Market Corolla Sport AE86 GT-S, 1984–1989 JDM and 1985–1989 U.S.-Market MR2 AW11, 1987–1991 JDM Corolla AE92 coupes, and 1988–1991 U.S.-Market Corolla AE92 GT-S. It also fits 1991–1995 JDM Corolla AE101 with the 4A-GZE; 20-valve 4A-GE timing systems are excluded.

Developed for high-power and high-RPM engine use, the Fine Tune Timing Belt uses application-specific belt strength to help maintain stable tension as engine temperatures change. Its molded-tooth manufacturing process forms the belt teeth without the external compression used in conventional production methods, helping preserve tooth strength and reduce the potential for belt skipping under high engine load.

High-strength H-NBR tooth rubber provides additional durability for demanding street, track, naturally aspirated, and supercharged 4A applications.

Key Features

• Performance timing belt for Toyota 4A-GE and 4A-GZE 16-valve engines
• 113R19.1 belt size
• Application-specific belt strength for high-power and high-RPM operation
• Designed to maintain stable belt tension as engine temperature changes
• Molded-tooth construction helps preserve tooth strength
• Helps reduce belt skipping under high engine load
• High-strength H-NBR tooth rubber
• Suitable for naturally aspirated and supercharged 4A applications
• Designed to pair well with adjustable cam gears and HKS Slide Cam Pulleys

H-NBR & Molded-Tooth Construction

Conventional timing-belt manufacturing can form the teeth by applying pressure from the outside of the belt, placing additional stress on the tooth structure during production. The HKS Fine Tune Timing Belt instead uses a mold shaped around the finished tooth profile, allowing the teeth to be formed while preserving more of their structural strength.

The tooth section uses H-NBR rubber for additional strength, while the belt itself is tuned for the intended engine application to provide stable operation during thermal expansion and demanding high-RPM use.

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.

Toyota Corolla Levin / Sprinter Trueno — AE101 — 7th Gen

• 1991–1995: Japanese-market 4A-GZE 16V.

Timing System: 4A-GE / 4A-GZE 16-valve engines using the 113R19.1 belt.

Important: Not for 20-valve 4A-GE timing systems or factory AE86 / AE92 SR5 engines.

Fitment Notes

• Engine-swapped or modified vehicles require the 4A-GE / 4A-GZE 16-valve timing system using a 113R19.1 belt; chassis identity alone does not establish fitment.
• This is a timing belt only; tensioners, bearings, seals and cam gears are not included.

For independently adjustable intake and exhaust cam timing, the matching HKS Adjustable Cam Gears are available separately.

Product Specifications

Brand: HKS
Series: Fine Tune
Product Type: Timing Belt
Engine Application: Toyota 4A-GE / 4A-GZE 16-Valve
Belt Size: 113R19.1
Tooth Material: High-Strength H-NBR Rubber
Design: Molded-Tooth Performance Timing Belt
Application: Naturally Aspirated & Supercharged
Fit Type: Vehicle-Specific Replacement

What's Included

• (1) HKS Fine Tune Timing Belt