Parts & Accessories Spare parts Gasoline regulator or fuel pressure regulator inside the injectors and the manifold. Regulator specifically for 4500, 100% sound and guaranteed. If it's not sound, return it. Its new price is no less than 400 riyals, and the selling price is fixed at 200, guaranteed sound. The reason for selling is that I bought it and didn't realize it was for a 4500 until a month later, and my car is a 4800.