VFactor V3.0 (265cc) SBC Cylinder Head
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, or Moldstar 90 valve seats depending on the application.
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
Wilkes Performance Titanium Retainers
Wilkes Performance Locators and Machined 10* Locks
Hand finishing by Speier Racing Heads is also available for those needing a set custom tailored to their application and combination.
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Flow Numbers
4.155" Fixture
.200 138/114
.300 200/154
.400 252/191
.500 294/218
.600 326/235
.700 344/248
.800 352/252
.900 358/254
1.000 363/256Technical Specs
2.990 sq in Avg CSA
2.980 sq in Minimum Size
5.400" Port Length
265cc Runner
1.390" x 2.400" Opening
2.150" Intake Valve with 33º Back Cut
1.600" Exhaust Valve
64-67cc ChamberGeneral Recommendations
Wilkes Performance assumes no responsibility for damage if the end user builds an engine without properly verifying he has enough piston to valve clearance (depth and radial clearance both checked). It is recommended for a minimum depth of .080″ on the intake valve and .100″ on the exhaust with a radial clearance of .030″ minimum around the perimeter of each valve. It is the customers responsibility to verify proper piston to valve clearance.