Patriot's custom 5 axis CNC machined new GM castings make these heads a must have for any performance oriented GM LS series engine. These heads provide up to a 80 cfm improvement over stock OEM versions. The 64cc chambers are a great choice for 4.00” and larger bore motors. These will work on both naturally aspirated and applications where forced induction or nitrous will be used. The Stage III heads feature our 5 angle 2.08”/1.60” valve job, hand blended, and custom honed bronze guides.

*Sold as Pair

Technical Specs:
Combustion Chamber: 64cc
Intake Runner: 227cc
Exhaust Runner: 70cc
Intake Valve: 2.08"
Exhaust Valve: 1.60"
Valve Guide Material: Manganese Bronze
Valve Job: 5-angle