State? In Texas, even in emissions areas around Hou and Dallas, yes. You're supposed to have a muffler, but the chances of them checking as long as the OBDII checks out are next to none.
However, the 5.0s sound great with a small flow-through style muffler, while still being quite loud, and are too raspy with straights.
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"Never Apologize For Being Patriotic" - Toby Keith - Better'n every R
oetry (Hopsin partially excluded)