AFR LS3 270cc Aluminum Cylinder Heads, 69cc Chambers, 6 Bolt with Parts

AFR’s 270cc LS3 big-valve heads feature 100% CNC ported intake, exhaust and chambers using our advanced engineering and flow techniques to produce the ultimate Rectangle Port head available today. The 2.200" intake valve increases curtain area and intake charge efficiency, supporting strong mid-range and sustained top-end. Designed around the 6-bolt option to enhanced head-gasket stability under elevated cylinder pressures that are ideal for high-boost and heavy nitrous, these same heads are also available in a 4-bolt configuration upon request for those straightforward fitments on traditional LS blocks and gaskets. Whether naturally aspirated or on the sauce, this head gives your LS3 the breathing capacity and sealing strategy to grow with your tune.