IMHO, for those who want to get a bit more flow but don't want to get the loud sound that comes with this mod, there is a differnt way to achieve almost the same thing.
First you must find the indented area directly next to the outlet hole of the exhaust, pretty simple right....? lol.
Second, you need to get a 1/8th drill bit and drill in this area and not past it, all the way around. Then get a small chisel and hit the remaining joining links between each hole. Hopefully you drilled each hole very close to the last one to make this step easier.
Third, you need to find a steel bar that will fit into the exhaust and also stick far enough out of it after it bottoms out deep inside the exhaust to be able to get a good strong hold of it. Now for the hardest part.......wiggle this bar around so that the tube which it is inside comes loose and free of the 3 small spot welds deep inside the can.
Forth, once you are sure it's free and is easily rattling around you need to get it out of the can. Sometimes this can be a bit tricky depending upon the jagged bits still sticking out. Get the tube out.
Fifth, once this tube is out get a large file or die grinder and clean off the sharp edges inside the opening.
Sixth, now you need to get a short piece of muffler pipe that is very close to the size of the hole you have made and angle it away from the rear fender so that the hot gasses don't melt or discolour the fender. Now weld it onto the can or get someone who has a welder do this for you.
Seventh, clean the job up with some BBQ paint.....job finished.
This way will get rid of the tweety tube and just the tweety tube. It won't be seriously loud like the other hole saw method which takes out the whole last baffle system of the muffler making it very loud. It gives the muffler better flow and a better deeper sound. A win win in my books.
It has been called the "Willys Exhaust Mod" just to differenciate between the two exhaust mods.......not that I need the ego stroking but...it doesn't hurt.....lol.
Oh...this way still leaves the spark arrester intact inside your exhaust.....another vote for doing it this way.
Hope this helps those who don't want the loud exhaust but want to get rid of the tweety sound......