I used the a breather grommet for the cast covers and put the original PCV grommet into it and fit nice. I took off my factory chrome covers and got a pair of black wrinkle mopar's at a swap meet for $50.00, brand new in the box, just missing the baffles. No big deal just made some from aluminum I had. 20 minute job...Hey you got to get a good deal once in a while...