Originally Posted by: sweetguitar16how much would a wammy bar cost for a epiphone sg lespaul custom.
its got a stock tail piece and i want to replace it.

Look for a guitar tech or a luthier (guitar builder) who can explain what needs to be done, and what it will cost.

There are many different kinds of tremolos to choose from, and some of them would require some modifications to your guitar. Prices will vary accordingly.