These high-performance Rocky Mountain heads provide more power, better hole-shots and top-end speeds. If you have a larger boat and loads, these heads will get you on step and keep you there.

Our 5400 heads are blue printed, ported and decked for modest higher compression while still meeting EPA lab testing and certification standards.

The stock valves are replaced with a larger solid stem stainless intake and exhaust valve.

The heads are then mounted precisely with high compression performance gaskets and Rocky Mountain hardened head bolts.

And, best yet, every head is CNC machined for exact tolerances and performance. From one engine to the other, each is exactly the same.