so i talked to my friend thats gonna hook it up for me..he said that it takes the fuel out all together which i didnt know..you spray nitrous and propane into the motor..i thought it was propane and fuel..but its propane and nitrous..i will have to have 2 separate tanks and he said that it doesnt puddle and its a lot safer...so i have to buy a nitrous kit then im paying him 100 bucks to set up the propane..then i will let everyone kno how it goes..