Which fuel pump?

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m1949

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I'm installing an LS364/450HP GM performance engine in my 06 Escalade and will also be replacing the fuel pump. I've been told I need a fuel pump that can deliver at least 255 Liters per minute fuel volume. I cannot find the LPM spec for the OE MU1639 fuel pump to determine I can replace with the same model or need to switch to a higher LPM pump. Any suggestions for a higher LPM pump if I have to change? I prefer to use GM parts if possible and want something that is a complete, drop-in assembly. Thanks.
 

Fless

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If you look at comparable pumps on Rock Auto, some list the minimum Gallons Per Hour. You might be able to figure it out from there. Here's an example but be sure to verify your application:

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