The HKS Upgraded Balancer Belt for the Mitsubishi 4G63 (HKS 24999-AM002) is a strengthened balance-shaft belt for 1G/2G DSM, GVR4, and Lancer Evolution I-IX. Because the balancer turns at twice crank speed, the stock belt stretches and can fall out of sync; this woven-aramid belt resists that stretch. Pair with the HKS 4G63 timing belt to reduce load on engine and chassis. 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.
| Series | HKS Fine Tune |
| Type | Balancer (balance-shaft) Belt |
| Engine | Mitsubishi 4G63 |
| Application | DSM 1G/2G, GVR4, Lancer Evolution I-IX |
| HKS Part Number | 24999-AM002 |
| Construction | Woven aramid (kevlar); heat-resistant |
