Anyone ever had to remove one or know the best way to do so? Im putting another exhaust on my 27 and the studs are pretty rough looking and rusty. Thought I might go ahead and replace them.

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Your new heads won't have em and you can use bolts.... If you are trying to put the exhaust on before you get your new heads done, use a stud removal tool. The one's I like, you hammer on to the stud and then use a ratchet to back em off.

http://www.sears.com/shc/s/p_10153_1260 ... ockType=G2

This one will work too, but I don't like it as much.

http://www.harborfreight.com/1-2-half-i ... 94640.html

I've double nutted them and jammed the bottom nut into the top nut to get 'em out before.