GM 441

This is about the most basic gm cylinder head and has the lowest flow numbers of any I have listed. Some porting would have to be done to make these head. s work.

• PORT SIZE: 155
• CHAMBER: 76cc
• VALVE SIZE: 1.94 / 1.5
• PRICE: N/A
• FLOW@.100: 55 / 45
• FLOW@.200: 110 / 80
• FLOW@.300: 160 / 112
• FLOW@.400: 194 / 127
• FLOW@.500: 201 / 136
• FLOW@.600: 203 / 139