GM 188

Replacement head for rectangle-port iron built between '68-'71..

• PORT SIZE: 317
• CHAMBER: 115cc
• VALVE SIZE: 2.19 / 1.88
• PRICE: N/A
• FLOW@.100: 68 / 45
• FLOW@.200: 129 / 90
• FLOW@.300: 188 / 131
• FLOW@.400: 233 / 170
• FLOW@.500: 259 / 188
• FLOW@.600: 291 / 195
• FLOW@.700: 313 / 200