RHS Pro Action Rectangle Port Aluminum Heads for LS3

Type: Bare
$ 485


Pro Action™ GM LS3 Rectangle Port Aluminum Cylinder Head - A premium LS3 replacement head, ensuring great power on any performance or stock engine build. 

Pro Action™ GM LS3 Rectangle Port Aluminum Cylinder Heads feature:

  • Same architecture as factory head - all stock components will fit without issue
  • Factory correct intake manifold alignment slots avoid power robbing misalignment
  • Manufactured with premium materials and machined to industry's tightest tolerances
  • Premium bronze/managnese valve guies for long wear with particular emphasis placed on holding precision tolerances on valve seat concentricity, allowing valve to seal secruely for more power
  • Clean Cast Technology eliminates casting laws and promotes a smoother internal surface finish for greater air and coolant flow
  • Dual seat spark plug pocket design allows both factory style tapered seat spark plugs and flat seat style pluggs in wider heat ranges
  • Designed for any LS3-style street performance application
  • 260CC Runners, 69CC Chamber, 2.165" / 1.590" Valves

Available in the following configuration


Assembled w/ .570" Lift Springs & Steel Retainers

Assembled w/ .660" Lift Springs & Steel Retainers

Sold as individual units not sold by the pair. 

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