A: It's been shown that 3" catback makes very little difference over a 2.5" B: You can't just "cut the hole bigger" in the muffler. There is a liner sized to the inlet. You'd have to completely rebuild the muffler, IE: just get a new one.
-Dan
"Capitalization is the difference between helping your Uncle Jack off a horse, and helping your uncle jack off a horse." "'she' also likes to swap since I think I am going to need to give her to woody again." - Dvlhntr "full alphabetic boost mode" - ChristopherTheOne " Purrs like a sexually satisfied black panther." - BigTDogg "Two oil eating, angry, spinning triangles of death." - turtleboy on rotary engines