Joe,
When I got my Flowmaster put on, I just had them angle the muffler down where the tip stuck straight out from under the bumper. There's about 1/4 inch clearance from the tip to the bottom edge of the bumper...
------------------
Andrew Morris
'99 SE Zetec ATX
Toreador Red/Greystone
KKM, badgeless, Knauberized
FlowTech Red Hot res, Flowmaster 40-series
http://www.mindspring.com/~drumnut
----------------------