GM PP 401

Great choice of a mid-ranged price performance head, flow is good up to .600, great for a high performance big block..

• PORT SIZE: 322
• CHAMBER: 118cc
• VALVE SIZE: 2.25 / 1.88
• PRICE: N/A
• FLOW@.100: 70 / 53
• FLOW@.200: 143 / 116
• FLOW@.300: 200 / 142
• FLOW@.400: 236 / 179
• FLOW@.500: 275 / 204
• FLOW@.600: 310 / 227
• FLOW@.700: 330 / 244
• FLOW@.800: 340 / 254