power boost valve

[CMF_piero]

hi, anyone know anything about power boost valves like if they add bhp or if its just a waste of time.

 

[CMF_sikK11]

Waste of time.

 

[CMF_fred]

if you mean an adjustable fuel pressure regulator/meter... then yeah, worthwhile if other stuff done first...ie exhaust & intake mods.. if its an adjustable regulating screw that goes between your intake and your brake booster, can't see how it would improve anything, imho, if anything would limit brake performance, since its limiting air/vacuum on that line.