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Twin Cam – Stage 4 Cnc Cylinder Heads
.Race-level CNC development using stock castings, designed to extract every ounce of power while maintaining durability and reliability:
Complete disassembly and full inspection of all components
Deep cleaning and media blasting of chambers and ports
Full CNC porting of intake and exhaust runners, optimized for high-lift flow and velocity balance
Superior choice on 4.125”+ Bore engines
CNC-machined high-efficiency un shrouded combustion chambers tailored for max compression and quench control to accept CVO Dome pistons chambers are 98cc before decking
Precision 4-angle valve job on performance seats
2.000” stainless intake valves / 1.630” exhaust valves replace seats
Upgraded bronze taper valve guides for superior heat transfer and long-term stability
Premium high-tension beehive valve springs matched for aggressive cam profiles
CNC deck for exact compression control and perfect gasket sealing
Final ultrasonic wash and professional assembly
Result: maximum airflow and combustion efficiency from OEM castings — engineered for all-out race builds and high-compression performance engines.
Note: This is a send-in service for your existing cylinder-head cores.
Customer must ship in clean, rebuildable head cores for this service.
Pricing covers machining and labor only — no cores are supplied or exchanged.
Any additional parts or repairs required beyond the listed service will be quoted separately upon inspection.
.Race-level CNC development using stock castings, designed to extract every ounce of power while maintaining durability and reliability:
Complete disassembly and full inspection of all components
Deep cleaning and media blasting of chambers and ports
Full CNC porting of intake and exhaust runners, optimized for high-lift flow and velocity balance
Superior choice on 4.125”+ Bore engines
CNC-machined high-efficiency un shrouded combustion chambers tailored for max compression and quench control to accept CVO Dome pistons chambers are 98cc before decking
Precision 4-angle valve job on performance seats
2.000” stainless intake valves / 1.630” exhaust valves replace seats
Upgraded bronze taper valve guides for superior heat transfer and long-term stability
Premium high-tension beehive valve springs matched for aggressive cam profiles
CNC deck for exact compression control and perfect gasket sealing
Final ultrasonic wash and professional assembly
Result: maximum airflow and combustion efficiency from OEM castings — engineered for all-out race builds and high-compression performance engines.
Note: This is a send-in service for your existing cylinder-head cores.
Customer must ship in clean, rebuildable head cores for this service.
Pricing covers machining and labor only — no cores are supplied or exchanged.
Any additional parts or repairs required beyond the listed service will be quoted separately upon inspection.