GM LS1

A redisigned port configuration has made these a unique head, they obviously work - just look at the new vettes and f-bodies..

• PORT SIZE: 204
• CHAMBER: 65cc
• VALVE SIZE: 2.00 / 1.55
• PRICE: N/A
• FLOW@.100: 83 / 55
• FLOW@.200: 134 / 98
• FLOW@.300: 189 / 130
• FLOW@.400: 222 / 156
• FLOW@.500: 240 / 175
• FLOW@.600: 252 / 182