Air Flow Research Magnum Aluminum Chev BB Heads
Highly efficient port designs, an exclusive combustion chamber Style provides impressive swirl figures and generates big low and mid-lift airflow figures. 3/4" thick decks, reinforced rocker bosses, and thick wall runners provide unparalleled durability. Hydraulic Roller Assemblies include stainless steel valves, PAC Racing Springs 1.550" dual springs (.725" max lift), 10° retainers and locks, 7/16" rocker studs, and guide plates. Mechanical Roller Assemblies include stainless steel valves, PAC Racing Springs 1.625" dual springs (.850" max lift), 10° retainers and locks, 7/16" rocker studs, and guide plates. |