Can your exhaust still be legal if?

Say if you had bmw E46 and you wanted the exhaust pipes to come out from bottom of the back door not behind the wheel and still have the cat will it still be legal?

1 Answer

  • ?
    Lv 7
    11 months ago

    One of the operational requirements is that exhaust fumes be directed away from the passenger cabin, so it depends on how it extrudes from the back door. If its just blowing fumes out at 90 degrees to the car, then it could theoretically enter the car interior, but if its blow back at an angle far enough from the sill, it could be safe.

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