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.
Payment & Security
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.