The speedkart.zip file you have requested: Modifications / Halo Trial Mods / Speedkart Mod / Speedkart Mod for Halo Trial - 110.2kb is not available. Perhaps try browsing all files for the game Halo: Combat Evolved and upload any files you want to share or are missing. This is the only information we could locate:
This mod is based on Biran's Mod. It makes the warthogs look like gokarts and increases their speed, too!