The only drawbacks to the Doma and Messico are that they lose low end grunt and are paper thin and will dent if you throw a marshmallow at them. We made the Turbine Core 2 work with a little light persuasion on the Doma, it fits right in the Messico. They both work with the Stock Gas Gas silencer too.
(We have a stock GG silencer on a 300 that we sliced into a shorty for use on closed courses. Teamed up with the Doma it's amazing. The shorty makes a HUGE difference - it will NOT pass ANY kind of a sound check however.
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