Alternator Belt - HKS Fine Tune V-Belt - GR YarisHKS Fine Tune V Belt for GR Yaris Using the latest in belt technology gives the following benefits: Increased durability at high temperatures which can be found in the engine bay of tuned vehicles. Increased performance in cold weather and condition. Lightweight and good friction tolerance properties which means that excess tension is not required while anti sound properties reduces belt squeal. The lightweight belt provides high following performance