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I have a 1973 Mach 1 Mustang and I want to put side exhaust in front of the rear wheels is this legal?
 

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no, its illegal, but no one will question you, you do not have to take emissions in WI(for that old of a car anyway) I have done this on a good portion of the cars i drive(side exhaust) and its always loud, ive been pulled over for speeding, burnt out headlight, but no one ever said anything about my exhaust........
 

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I have been inspecting vehicles for over 30 years and it is illegal in all states plus if you get passed the inspection part you will stand the chance of being ticketed for this violation and you will loose your inspection certificate.

The reason is that running your exhaust this way will allow the flumes to enter the vehicle from the side while your are sitting still.
 

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Technically it is illegal. But I don't think any cop out there is going to make an issue of it. Especially on a classic antique muscle car!
 
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