Get faster spool with a th400 dump valve kit
Installing a th400 dump valve kit is one of those upgrades that feels like a total game-changer the very first time you hit the track. If you've ever sat at the staging beams with a big turbo, watching your boost gauge climb in the speed of a snail while your transmission fluid temperature skyrockets, you know exactly why these kits exist. The TH400 is an absolute tank of a transmission, but when you're wanting to marry it to a high-horsepower turbo setup, you sometimes need a little extra assistance to get everything relocating sync. ...