Fram Pro 9688 baseplate. Note number of inlet holes
Now, fram Drive 3614
Not as many inlet holes. I doubt it makes big difference; I just noticed it. And here I thought Drive filter was wire backed but appears not. Pro filter is first, Fram Drive 2nd pic. 3rd pic is Fram Drive center tube
Now, fram Drive 3614
Not as many inlet holes. I doubt it makes big difference; I just noticed it. And here I thought Drive filter was wire backed but appears not. Pro filter is first, Fram Drive 2nd pic. 3rd pic is Fram Drive center tube