Stock valves stock combustion chamber Lift cfm .100 81 .200 156 .300 207 .350 226 1 mm oversize valves with stock combustion chamber Lift cfm .100 65 .200 147 .300 210 .350 246 1 mm oversize valves with chamber work Lift cfm .100 90 .200 175 .300 231 .350 252
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