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For the cans i got there was no way to put a spray peace on it...it was a can with a water bottle top...it was very easy the way i did it...
the vacuum hoses do just as it sounds, they suck, so if you had just ran a small hose from the bottle, to the vacuum, when u turn the engine over ( if the sensors are disconnected like in the instructions) it sucks the seafoam out of the can on its own.