Yea, a stud remover. The full name is cam action stud remover. It worked real well on my 460. Alot of exhaust shops will heat the pipe nuts/bolts cherry red then undo them. I just cut mine off instead. Dont run the truck with an exhaust leak cause it will erode the flange of the head and then it wont seal for you. I put Banks headers on mine. Spendy but permanent. I got an extra long breaker bar from Snap-On which was like heaven to use and one of their extra long box wrenches for those real hard to reach ones. Ive already decided if those heads ever have to come off thats it Im sellin it. Warping exhaust manifolds have been a problem for years. You'd think Ford might try and correct that but the V10's and alot of other engines are doin it too. Maybe it's that the average bill to get manifolds replaced/broken studs etc at the dealer is $1700 bucks so that helps them meet payroll I suppose.