Home > VFactor 23º SBC Cylinder Heads
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Small Bore - 350 Based Engines
Large Bore - 400 Based Engines

The VFactor 23° SBC Cylinder Heads start with a premium Aerospace Specification A356 (Primary Virgin Ingot) aluminum casting that is semi-finished by Profiler Performance. These castings, originally developed by Darin Morgan with custom head porters in mind, are both light weight and extremely corrosion resistant and feature a solid rocker pad for improved valvetrain stability, and a revised spark plug location to improve flame travel. Utilizing a semi-finished casting allows us the flexibility to offer 5/16”, 11/32” or 8mm valve stem sizes, and standard ductile iron, Durabond Killer Bee or Moldstar 90 valve seats depending on the application.

Hand finishing by Speier Racing Heads is also available for those needing a set custom tailored to their application and combination.

VFactor Heads can be purchased bare or fully assembled.
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VFactor 23° v2.35/205cc LBSR VFactor 23° v2.35/205cc LBSR

The VFactor 23° v2.35/205cc LBSR is a Large Bore cylinder head. This cylinder head is an excellent option for 377-410 CI engines.

Heads can be purchased bare or fully assembled.

Standard Assembled Package includes:
Ductile Iron Valve Seats
8mm Stainless Steel Pro Valves
PAC 1226 .800" Lift Valve Springs
LGM Titanium Retainers
LGM Locators and Machined 10* Locks

For valve and valve spring options, please call us @ (256) 279 8000.

Our Price: $3,799.99
VFactor 23° v2.35/205cc SBSR VFactor 23° v2.35/205cc SBSR

The VFactor 23° v2.35/205cc SBSR is a dedicated Small Bore cylinder head. This is the perfect head for 4.060" bore, 389 CI and smaller builds. Take advantage of one of the only dedicated small bore offerings in the industry!

Heads can be purchased bare or fully assembled.

Standard Assembled Package includes:
Ductile Iron Valve Seats
8mm Stainless Steel Pro Valves
PAC 1226 .800" Lift Valve Springs
LGM Titanium Retainers
LGM Locators and Machined 10* Locks

For valve and valve spring options, please call us @ (256) 279 8000.

Our Price: $3,799.99
VFactor 23° v2.50/227cc LBSR VFactor 23° v2.50/227cc LBSR

The VFactor 23° v2.50/227cc LBSR is a Large Bore cylinder head. This cylinder head is an excellent (and the most popular) option for 406-421 CI engines.

Heads can be purchased bare or fully assembled.

Standard Assembled Package includes:
Ductile Iron Valve Seats
8mm Stainless Steel Pro Valves
PAC 1226 .800" Lift Valve Springs
LGM Titanium Retainers
LGM Locators and Machined 10* Locks

For valve and valve spring options, please call us @ (256) 279 8000.

Our Price: $3,799.99
VFactor 23° v2.50/227cc SBSR VFactor 23° v2.50/227cc SBSR

The VFactor 23° v2.50/227cc SBSR is a dedicated Small Bore Cylinder Head. This is a great option for 4.060" bore, 389 CI and smaller engines that require more airflow than the VFactor 23° v2.35/205cc SBSR.

Heads can be purchased bare or fully assembled.

Standard Assembled Package includes:
Ductile Iron Valve Seats
8mm Stainless Steel Pro Valves
PAC 1226 .800" Lift Valve Springs
LGM Titanium Retainers
LGM Locators and Machined 10* Locks

For valve and valve spring options, please call us @ (256) 279 8000.

Our Price: $3,799.99
VFactor 23° v2.70/250cc LBSR VFactor 23° v2.70/250cc LBSR

The VFactor 23° v2.70/250cc LBSR is a Large Bore cylinder head. This cylinder head is an excellent option for 421-434 CI engines.

Heads can be purchased bare or fully assembled.

Standard Assembled Package includes:
Ductile Iron Valve Seats
8mm Stainless Steel Pro Valves
PAC 1226 .800" Lift Valve Springs
LGM Titanium Retainers
LGM Locators and Machined 10* Locks

For valve and valve spring options, please call us @ (256) 279 8000.

Our Price: $3,799.99
VFactor 23° v3.00/265cc LBMR VFactor 23° v3.00/265cc LBMR

The VFactor 23° v3.00/265cc LBMR is simply one Bad Ass 23° cylinder head! This is our largest, best flowing cylinder head and supports 850+HP N/A!

Note: The VFactor 23° v3.00/265cc LBMR does require the use of a Raised Runner Intake Manifold due to the roof being raised above the typical Standard Runner location.

Heads can be purchased bare or fully assembled.

Standard Assembled Package includes:
Ductile Iron Valve Seats
8mm Stainless Steel Pro Valves
PAC 1226 .800" Lift Valve Springs
LGM Titanium Retainers
LGM Locators and Machined 10* Locks

For valve and valve spring options, please call us @ (256) 279 8000.

Our Price: $4,299.99