AEM High Volume Filter + Adjustable Fuel Pressure Regulator (25-300BK+25-200BK). BRAND NEW IN BOX. AEM – Fuel Pressure Regulator. AEM – High Volume Filter. Adjustable Fuel Pressure Regulator. CNC-machined from 6061-T6 billet aluminum. Mounts directly to O. Fuel rail or AEM High Volume Fuel Rail. Patented interchangeable discharge orifices match output of virtually any fuel […]