Vacuum seal the air-cleaner intake. Disconnect the air sensor and pull out the black rubber precleaner air tube. Make sure it fits the snorkel's intermediate tube. Ours didn't so you can see here that we shortened it and cut a 21/2-inch incision into the rubber. Then we returned it to the precleaner and fit it through the inside of the fender into the intermediate tube securing it with a hose clamp. One bolt holds the intermediate tube to the fenderwell.