Proton Saga BLM FLX = Engine Campro S4PH. Proton Satria Neo = Engine Campro S4PH. Proton Gen2 = Engine Campro S4PH. Proton Persona = Engine Campro S4PH. SPEEDGEAR Racing Valve Springs are able to prevent valve float and maintain valvetrain stability at engine speeds in excess of 10,000 rpm.
