Stfu. I never heard one person ever mention anything about drilling those 2 holes larger. I took a long look at my exhaust, figured where the gas flows, and figured out where the restrictions were.
I only heard of one person cutting the tube shorter, so the fact that I mention it is not parrot speech it is simply another logical way to de restrict it.
Look Bret get off my back. I dont know what your problem is but all I am doing is helping people. Go take a look at the inside of a Moby muffler and you will see everything I say makes perfect sense.