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i have asked numerous people this question with answers all over the place.

i have a mallory comp 250 fuel pump. i want to run a 150 hp shot of nos.

will my 250 pump be able to handle this?

550 hp small block.

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It depends of course,what size pickup and line size to the front and what type and size fuel filters and where are they? Maybe, but not safely Magnafuel says there 275 pump is good to 750 HP, IF everything else(lines and fuel filters) are correct and the stars are aligned properly Why not have more fuel volume than you need You know if you like a 150 shot of NOS your going to go bigger