Ive heard around 350, custom heads, build to suit, what every octane you want they will build to your specs. Are they worth the money? you tell me, I am trying speedwerx head, got a deal new 280 will keep posts up when we have enough snow
sledcrazy i thought you had already ordered one before?i really havent heard of any 600's running one,but they work great on the 7 and 8's,im running a premium head,love the fact i can go down on the jetting,and even better the power band do a search on the western site ,there is a ton of guys who run them,its a very good mod to do..
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