I was speaking with Carl Jansen this week and he is getting a run of Rock Island F/ FA 18-35 manifolds done. they will be $1500 for the bare casting and $1900 if machined if he does a run of 20, if he can get enough to justify a run of 30, the price will drop. If you need his contact info pm or email me. Considering how many F's need manifolds and how hard they are to find good ones, this is the best shot to get one for anyone needing one. These will fit a 4 cylinder Buda YR/YRA engine or compatible variant.