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Message: <blockquote data-quote="MustangChris" data-source="post: 545996" data-attributes="member: 10830">stock heads suck.PI heads are nice for a 96-98 because it raises the compression ratio while still improving flow.Ported and Polished PI heads are the best we have right now. You can get patriot heads, but their quality is, and always will be, in question. They offer some extream ports, but many people wont trust them (me included.)Trick flow are coming out with 2v heads that are supposed to revolutionize the 4.6 2v world. They offer stage 3 heads for blower applications that STILL HAVE ROOM FOR PORTING. why this is important is because when your pressing for 801 HP instead of 800, a custom port might be in order, and the head shop will need some matieral to work with.They relocated the spark plug closer to the center of the combustion chamber.they relocated the exhaust valve for better "in-n-out" flow.they have material on the gasket surfaces for decking purposes incase you want to raise compression.they are compatable with both romeo and windsor valve covers.the trick flow heads are God's gift to the SN95s.</blockquote>