- Jun 2, 2004
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I am wondering if an aftermarket catted X pipe is legal in Massachusetts and if they will pass inspection. Also what kind do you have?
Thank you all!!
Thank you all!!


03silverstang said:I am wondering if an aftermarket catted X pipe is legal in Massachusetts and if they will pass inspection. Also what kind do you have?
Thank you all!!![]()

mansonozz said:It depends on where you go.
BY THE BOOK, anything LOUDER than STOCK is illegal. Most places don't bother with that as long as it:
a) has cats
b) throws no codes
c) passes the sniffer
Depending on what kinda loosely run shop you can find, they may not even care about some of those. And depending who likes a heavier wallet, you may be able to swing by and pass with open headers![]()
HiFlow5 0 said:And it's also illegal to replace your cat with under 50 or 60k miles on the car.