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.
4.155" Fixture .200 141/113
.300 201/155
.400 248/189
.500 290/212
.600 318/230
.700 325/241
.800 330/248
.900 334/252
1.000 338/254
2.530 sq in Avg CSA
2.470 sq in Minimum Size
5.450" Port Length
227cc Runner
1.320" x 2.230" Opening
2.080" Intake Valve with 33º Back Cut
1.600" Exhaust Valve
64-72cc Chamber
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