The HKS Upgraded Timing Belt fits Subaru EJ20 and EJ25 engines (HKS 24999-AF001), covering 2002-2008 WRX and 2004-2008 STI and related Legacy GT / Forester XT applications. HKS Fine Tune belts use heat-resistant H-NBR grade tooth rubber and a strengthened construction that holds stable tension under heat expansion and high RPM, reducing cracking, stretch, and tooth skip versus an OEM belt. Designed for tuned, high-output engines and suited for use with the HKS Slide Cam-Pulley.
Specifications
| Series | HKS Fine Tune |
| Type | Timing Belt |
| Engine | Subaru EJ20 / EJ25 |
| Application | 02-08 WRX, 04-08 STI (also Legacy GT, Forester XT) |
| HKS Part Number | 24999-AF001 |
| Construction | Heat-resistant H-NBR; reinforced |
| Part Number | 24999-AF001 |
Shipping
- In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Backordered items ship as soon as stock lands — contact us for lead times.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30-day returns on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
- Installed or used parts can’t be returned — confirm fitment before you install.
- Special orders and custom items are final sale.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Refund Policy
