This is a replacement Kyosho Front Battery Box Set, and is intended for use with the Kyosho Inferno TKI3 1/8 scale buggy. This is can also be used to update previous MP9 models, but additional parts will be required (See note below). This is the updated battery box that moves the battery forward to improve balance and traction. The box is sealed and will fit a standard 5 cell hump pack, as well as a LiPo hump pack. Plus, the lid is hinged to allow for quick and easy battery changes. NOTE: If you are going to update your existing MP9, you will also need to purchase the following parts to complete the conversion;