Raptor 150?
 

Will i benefit at all by installing a Raptor lift pump on my truck?

I only have a Superchips FlashPaq on it so far and straight piped the exhaust to dual 5,5" stacks

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update with sig.

Nope.

How far can he go with the stock lift pump ?

There is no "lift" pump in a powerstroke. Just a fuel pump.

However the stock fuel pump and system is good to about 238cc injectors. A small nozzle will help. Once you get above 160cc injector a regulated return fuel system helps the flow, but will not give you any more HP.

At 238-250cc injectors the stock fuel pump starts to struggle (and can at smaller injector sizes if its old, or has tank issues) but what most do is just add 2 factory pumps with a 5/8" pick up.

There are lots of great fuel systems out there for the 7.3, however none are needed with stock injectors.