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Old 06-23-2019, 12:46 PM
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Default 454 EFI upgrades

Looking at a fresh water ski boat with a very low hr 454 with factory efi. I've been a carb guy up to now.
I'd like to see a reliable 500 hp from it. What's needed- a PCM upgrade, cam, injectors?
Thx.
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Old 06-23-2019, 12:51 PM
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You will need to sell it and buy a good used Merc 525.

Chris
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