Ported PI Heads

Discussion in 'SN95 4.6L Mustang Tech' started by AhlStang, Dec 9, 2003.

  1. I know some of you have ported PI heads. Has anyone had a car dynoed to see what the power increase is? I have to pull my heads to get the back driver side spark plyg hole re-threaded because it stripped. While I have them off, I was planning on just getting them ported. I can get it done for $250 so I figured I would go ahead. But I was wondering about the performance gain.

    I know the PI heads are already opened up quite a bit more that the older heads, so how much more can they actually be ported. Is it enough to make a noticable difference? Thanks...