crewy
+1y
im a full size trucker building a mini. I chose the mazda do to its body lines and cus i got a granpa clean ass b series. changing out motors do to a blown head gasket oh yea didnt tell you had another on stand by so changing it out. Anyways while pulling off the the manifold i notice that the cat just below the o2 sensor was all all busted up. Thats probably why the head went do to a bad cat. So was wondering all of the direct bolt in cats are 250 but they wont send into cali. So is that telling me i haven run a straight pipe or even run a straight pipe thru the cat to pass the visual. So anybody have a clue let me know thanks