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FantaZy

02-28-2017 11:47 AM

454 Mag compression

I am looking at buying a 454 Mag with ported heads. Engine has around 125 hours on it. All the compression numbers were 130-140. Do these number look low or do they look ok? I know they should all be within 10% of each other. I have been told the compression on the mag will be lower vs a stock 454. Thanks

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