ProMaxx Performance Heads for your Ford 2V 4.6L / 5.4L

When we decided to sell Aftermarket Performance cylinder heads the decision was easy! When performance counts, the Promaxx Performance CNC-ported Cylinder Heads for the Ford 4.6L and 5.4L 2 Valve delivers. Promaxx Shocker SBF Modular Performance Stage 2 and Stage 3 Windsor or Romeo heads come fully assembled and can handle blown or nitrous applications.


The stage 2 heads feature 46cc combustion chambers; 180cc intake runners and 67cc exhaust runners; Stainless, undercut 1.78″ intake / 1.45″ exhaust valves; bronze intake and exhaust guides; titanium retainers and 5-angle machined, hardened seats.