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Thread: Holley list 4548-S 450 cfm metering block

  1. #11

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    Yea Troy, I'm thinking the samething. Just not sure enough to try that block just yet. I have tried to get through to Holley's tech line but the wait has been long and I just give up. Just have to keep trying...your help has been great. Thank You ever so much...John

  2. #12

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    Hi johnrodz. Not sure if you still need help, but if you do, the correct numbers on the Holley 4548-S primary metering block are 6343 and below that number is 4548. Some don't have the 4548 on them below the 6343, but most that I have seen do. The secondary metering plate is #30 and below that is 34R-2007 B. Rick

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