HKS 24999-AT007 Fine Tune Timing Belt for 1989-1995 Toyota MR2/Celica 3S-GTE RWD

Vehicle Fitment

• 1989-1993 Toyota MR2 (SW20, 2.0L 3S-GTE Turbo, RWD) - JDM
• 1991-1995 Toyota MR2 Turbo (SW20, 2.0L 3S-GTE Turbo, RWD) - USDM
• 1989-1991 Toyota Celica (ST182/ST183, 2.0L 3S-GE, RWD/AWD) - JDM
• 1989-1993 Toyota Celica GT-Four (ST185, 2.0L 3S-GTE Turbo, AWD) - JDM

Fitment Notes

• Fits both 3S-GE and 3S-GTE engine variants across ST182, ST183, and ST185 Celica platforms
• USDM MR2 Turbo fitment covers 1991-1995 (SW20); JDM MR2 SW20 fitment covers 1989-1993
• Replaces OEM timing belt reference number 13568-79405
• Optimized for use with HKS Slide Cam Pulleys for high-power and high-RPM applications

Features

• Kevlar-reinforced construction for exceptional resistance to stretching, skipping, and snapping
• H-NBR mould-formed tooth profile prevents tooth deformation under high-torque conditions
• Belt strength optimized specifically for the 3S-G(T)E engine application
• Stable belt tension maintained during heat expansion in tuned engine bay temperatures
• Lightweight design reduces parasitic engine drag
• Purple HKS-branded belt with logo and product code stamped directly on the belt

Specifications

• Belt Size: 178Y25.4
• Belt Color: Purple (HKS branded)
• Material: Kevlar with H-NBR Mould-Formed Tooth Rubber
• OEM Cross-Reference: 13568-79405
• Compatible Engines: 2.0L 3S-GE, 2.0L 3S-GTE
• Platforms: Toyota MR2 SW20, Toyota Celica ST182 / ST183 / ST185

Included Components

• 1x HKS Fine Tune Timing Belt (178Y25.4)

Product Description

The HKS 24999-AT007 Fine Tune Timing Belt is a direct OEM replacement engineered for Toyota's 3S-GE and 3S-GTE engines found in the second-generation MR2 (SW20) and the Celica ST182, ST183, and ST185 platforms. Built with Kevlar reinforcement and an H-NBR mould-formed tooth profile, this belt is significantly more resistant to heat fatigue, stretching, and belt skip compared to the factory timing belt - making it an ideal upgrade for both stock and modified 3S engine builds.

Belt tension stability during heat expansion is a design priority, ensuring consistent cam timing accuracy under the elevated under-hood temperatures common in turbocharged and high-RPM applications. This belt is particularly well-suited for pairing with HKS Slide Cam Pulleys, where precise belt engagement is essential. It serves as a direct drop-in replacement for OEM part number 13568-79405.