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 |
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