Quote Originally Posted by hkwe36 View Post
Besides one being jdm and the other usdm. Any other changes. If so which is better and why. Thanks.
http://www.honda-tech.com/showthread.php?t=217469

PR3 = B16/ITR head, P72 = GSR head.

PR3 (ITR/B16) left, GSR (P72) right.


PR3 is supposed to flow better... but if you're getting port work done anyways...