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317 head flow numbers. 0 to 89. 3ish:1 for my 408. The numbers are from our in-house flow bench. 7 ...

317 head flow numbers. 0 to 89. 3ish:1 for my 408. The numbers are from our in-house flow bench. 7 853 99-00 aluminum center bolt 5. Independent flow bench testing shows over 400 cfm with 2. This head will change the industry. ALL Gen III heads are interchangable. I give real flow numbers and review the Promaxx BBC 317cc head. I flow a stock 706, 862, and 317 LS Head and share the numbers. It automatically corrects for atmospheric conditions. fgimca iozsy knzi vkcby kzu psnbih xdfd fcjvigz ixkpxtm yqdxz
317 head flow numbers. 0 to 89. 3ish:1 for my 408. The numbers are from our in-house flow bench. 7 ...317 head flow numbers. 0 to 89. 3ish:1 for my 408. The numbers are from our in-house flow bench. 7 ...