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Evo / XL / Twin Cam – Stage 1.5 Cylinder Heads
Complete performance rebuild with upgraded valve sizing and CNC-machined chambers:
One of our most popular heads great choice for a mild hot rod 95-107”
Full disassembly and inspection of all components
Deep cleaning and media blasting of chambers and ports
Hand ported as well Pocket porting with corrected throat diameters for optimal flow balance
Precision 3-angle valve job
Bead-blast and resurface valve faces
Upgraded 1.900” intake / 1.610” exhaust stainless valves
CNC-machined combustion chambers for improved flow and consistency
CNC deck for perfect sealing and uniform chamber volume
Final ultrasonic wash and assembly with premium beehive valve springs
Result: increased airflow, better chamber efficiency, and stronger mid-range torque — a perfect step up for riders wanting more power without going full race.
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 is for machine work 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.
Complete performance rebuild with upgraded valve sizing and CNC-machined chambers:
One of our most popular heads great choice for a mild hot rod 95-107”
Full disassembly and inspection of all components
Deep cleaning and media blasting of chambers and ports
Hand ported as well Pocket porting with corrected throat diameters for optimal flow balance
Precision 3-angle valve job
Bead-blast and resurface valve faces
Upgraded 1.900” intake / 1.610” exhaust stainless valves
CNC-machined combustion chambers for improved flow and consistency
CNC deck for perfect sealing and uniform chamber volume
Final ultrasonic wash and assembly with premium beehive valve springs
Result: increased airflow, better chamber efficiency, and stronger mid-range torque — a perfect step up for riders wanting more power without going full race.
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 is for machine work 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.