took the words right out of my mouth +1Its a charcoal canister. Part of your emmisions system. As gas evaporates from your tank it goes into a hard line that then runs to that. It stores is while the car is off, and when your car is running it recirculates it back into the intake after its been all processed and shit. Get rid of it, take the ugly hard line of the fire wall and run a single vaccum line from the original hard line to the intake, and cap of the rest. UNLESS you live in a gay state or town where you have to have emmissions to pass. Then keep it. I got rid of mine and it makes the bay look alot cleaner BTW you should check out the FSM`s, they are alot of help.