How would you even get an impact onto the nuts holding the exhaust manifolds on? You cannot use universal sockets and extentions as they reduce the impact effect and besides there is very little control when using an impact wrench. Look at how often they break wheel lugs off in tire shops. Even if it did work you would probably rip the threads off of everything. Go to Midas or Meineke and you will see how the professionals do this kind of work, with an acetalyne torch, sawzalls and pneumatic ractchets (not impacts). Everyone has their favorite method for removing stubborn fasteners. Many novices are not comfortable using a torch but I have found it to be the method of choice whenever possible. There are many circumstances where use of a torch isn't appropriate, usually because of flammable things too close by like fuel lines, cloth, and fiberglass. When working on exhaust systems that isn't usually a problem because things that can be damaged by heat aren't usually placed close to the exhaust anyway. David Teitelbaum vin 10757 --- In dmcnews@xxxx, "Walter Coe" <Whalt@xxxx> wrote: > My method of choice for removing stuck bolts is to use an impact wrench. My > logic here is that a jarring motion is more apt to shake it loose; whereas, > a slow gradually increasing torque applied by hand will let it twist off and