Fila Progress Thread ( reviesed and minus all the BS) 56K death

Reply #75 – September 24, 2007, 01:49:34 PM

*P* specific headers from Ford Racing are about ~$250 but they are stainless steel and won't rust. Are *P* heads worth it over regular GT40s? Depends on who you talk to. From what I've found stock they flow a bit more air on the intake (almost 200 cfm stock) and exhaust than the regular GT40s. They also have smaller combustion chambers than the regular GT40s (~60cc vs ~63cc) giving you a slight bump in compression. They will make a bit more power than regualr GT40s when set up right. The headers for them cost more than what you're paying for the heads so you have to decide if the heads are worth it. It still sounds cheap for GT40Ps to me. I'd atleast have them checked by a machiene shop and serviced before bolting them on.