Pro Action Small Block Ford Aluminum Cylinder Head (20° Valve Angle)

Available Bare or Assembled


Pro Action™ Small Block Ford 289-351c.i. Aluminum Heads

The Small Block Windsor and 5.0-liter engines are two of the most popular engine designs in the history of Ford technology. And now, RHS® has developed an impressive head series to provide Small Block Ford engines with increased airflow and horsepower - no porting or modifications needed. RHS® Pro Action™ Small Block Ford Cylinder Heads include more standard features than any Ford head in the industry, including premium bronze valve guides for extended valve sealing and durability. With a host of runner and chamber sizes to meet various performance needs, these heads are truly the race winner's choice.

  • Designed for Small Block Ford 289-351 Windsor & 5.0-liter engines; Compatible w/ all OEM & aftermarket components

  • Clean Cast Technology™ provides better casting quality for minimized airflow restriction & improved airflow efficiency

  • Dual exhaust bolt pattern fits both stock manifold & large tube headers

  • Smaller valve package (1.940"/1.600") allows usage w/o piston modification