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well, if you ever need that much fuel pressure, you better take me to the moon with you. seriously. stock is 40'ish psi. NO n/a 3400 will EVER need more than 60psi of fuel, hell, boosted 3400's dont even need more than stock with correct tuning and fuel injectors and fuel pump. and then if they dont have the tuning, they only need 1psi of fuel pressure extra per 1psi of boost. so even then, if you run 42 psi on the regulator, even at 15 psi you wont go past 57psi of fuel pressure.
so that high of fuel pressure the rksport one offers shouldnt be a selling point.
and i think the pfyc.com unit goes to 48psi at idle and up to 80 psi with boost and seems to be of better quality than the rksport one. i could be wrong, but i know of at least 1 person using it sucsessfully in a turbo'd application.
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