My 3A had a screw on oil filter when I bought it and I really like it. Uses a Wix or Napa 1050 filter and is extremely convenient to change out. It is mounted just in front of the tube for the dipstick and the bracket is secured by the front two head nuts on the right side. Two steel braided supply lines run from the bottom of the bracket to the usual places on the engine. I don't know where you buy these set-ups but it works great. Obviously a different look than the original Fram. If you find out where to buy them, you might let us know.