Don't get any that look like this though. They don't actually have any parts inside to regulate fuel pressure correctly. Literally just a plastic disc and a spring: Cheap crap. Comes in many colours
many thanks for now i have the crap one as my dead can you know how much thay boost up the presure ? now i have 3 bar on idle and 3.5 on boost so its boost it for 0.5 bar do you think i can find one that boost in 1 bar ?