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yes i have stock 2001 5.4L and i am going to put a new cam in it from crower cams. and i want to know if there is any way i can find out about how much more horsepower and torqe i will get from this cam, i have the specs for it Adv Duration Duration @.050 Gross Lift w/1.8
Crower is the one that can answer that question for you. Send them an email and ask them....
Also, you are going to have to install headers, intake, programmer / chip, and a good Cat Back to get the full benefit of the cams. Crower will more than likely give you a spec with this in mind.