The hgts.zip file you have requested: Modifications / Cars / foreign / hsv / HSV VT GTS Series II - 2.07mb is not available. Perhaps try browsing all files for the game Need for Speed High Stakes and upload any files you want to share or are missing. This is the only information we could locate:
An Official addon model of a HSV VT GTS Series II for NFS: High Stakes. This model includes upgrades.