New production cylinder head castings that are CNC ported to increase flow and performance. Intake flow is increased appoximately 20% and exhaust flow is increased appoximately 30%. These heads are assembled with production springs, valves, retainers, locks, and seals. Does not include camshaft, followers, and hydraulic lash adjusters. Minimize your vehicle down time waiting for a shop to port your heads. Get a brand new head for a little more than the price of exchange! No exchange required.


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