Not sure if this belongs here

What is the difference between a Fuel Regulator and a Fuel Pressure Regulator? http://www.andysautosport.com/products.php?id=Ac90Integr&make=Acura&mcat=Fuel%20System&scat=Fuel%20Pressure%20Regulators

What do they do for performance?

Also if I were to upgrade my fuel Filter what would that do for performance?

Sry if its a stupid question but it was under performance mods on http://www.andysautosport.com
Thanks

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