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The HKS 02-08 WRX / 04-08 STi EJ20/25 Upgraded Timing Belt is designed for the 2002-2008 Subaru Impreza. Match manufacturer part number 24999-AF001, the complete vehicle or system configuration, dimensions, connections, and included components before ordering.
Key Features
- Aramid Fiber Core: Delivers three times the tensile strength of standard rubber belts to handle boosted power levels without stretching or snapping.
- Extended Service Life: Lasts up to 100,000 km with proper maintenance far outpacing OEM intervals for fewer replacements.
- Direct OEM Fitment: Matches factory specifications for easy installation on EJ20T and EJ25T engines without modifications.
- Uses existing OEM tensioner hardware and mounting points.
- Yes it directly replaces the OEM belt on all EJ257 STI engines from 2004-2008 with no alterations needed.
- High-modulus rubber reinforced by aramid fibers provides strength heat resistance and protection against oil exposure.
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 2002-2008 | Subaru | Impreza | Confirm engine, body style, system configuration, and exact interface |
Specifications
| Brand | HKS |
|---|---|
| Manufacturer Part Number | 24999-AF001 |
| Product Type | Belts - Timing, Accessory |
| Fitment Type | Vehicle Specific |
| Condition | New |
What's Included
One new HKS belts - timing, accessory identified by manufacturer part number 24999-AF001, in the quantity stated by the title. Additional wiring, pipes, hoses, clamps, fittings, gaskets, fluids, tuning, tools, and installation hardware are included only when expressly listed for this exact part number.
About HKS
HKS develops exhaust, forced-induction, cooling, engine, electronics, and exterior components for import and performance vehicle applications.
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Frequently Asked Questions
How do I confirm this HKS engine or drivetrain part is correct?
Match the exact part number, engine family, vehicle application where listed, dimensions, threads, mounting points, and system interface. Engine or chassis codes are verification details, not Convermax model names.
Are seals, fluids, and installation hardware included?
Only components expressly listed for the exact part number are included. New seals, fluids, fasteners, adapters, or service parts may be required.
Does this part require professional setup or tuning?
Some engine, airflow, and drivetrain parts require measurements, calibration, break-in, or professional installation. Follow current HKS and vehicle service procedures.
Installation Instructions
Follow the current HKS instructions and the vehicle service manual for part number 24999-AF001. Compare every component, connection, dimension, and mounting point before disassembly. Use the correct tools, fasteners, torque values, fluids, wiring protection, and safety procedures, then inspect for leaks, interference, heat exposure, clearance, and secure operation before normal use.
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