they are a bit difficult to install. you can mount the bottle anywhere on the vehicle, perferrably close to the engine. You will need to drill and then tap with a a machine tap, a hole in the side of the carb. Make sure the carb is off when doing this to prevent metal shavings from going inside the engine. then, screw in the nozzle that came with the bottle, make sure you use thread lock, and gasket sealent around the edges to prevent air leaks.

Since it was a christmas preasent, I wont praise or knock it - but I would recommend you do a search about boost bottles here at RCU and read up on them before installing it.