Feb 1, 2003 #1 C cogdrive New Member Joined Jun 14, 2002 Messages 20 Does anyone know who ported this Stage 2 aluminum head, the markings on the rocker pads are (PROG 1813) and (DE 18/90). Also I'm looking for one to match it to make a pair if anyone has a single to sell.
Does anyone know who ported this Stage 2 aluminum head, the markings on the rocker pads are (PROG 1813) and (DE 18/90). Also I'm looking for one to match it to make a pair if anyone has a single to sell.