Masuma fuel pumps are manufactured on ACDelco assembly lines & mdash; OEM supplier of General Motors fuel pumps. They are distinguished by high build quality, stable performance and durability. Strict quality control implemented in production guarantees a minimum percentage of rejects. Design features Masuma fuel pumps are equipped with a quality check valve and bypass valve. The check valve maintains the pressure in the fuel line after the pump is turned off, preventing fuel from flowing into the tank when the car is parked, which improves engine starting. The bypass (safety) valve protects the pump from overload in the event of a pressure regulator failure; it is also required for vehicles without a return fuel line. The technologically advanced electrical part of Masuma gasoline pumps provides high performance and fuel pressure with minimal internal resistance and current consumption. Coarse filter Most Masuma gasoline pumps already have a coarse fuel mesh, which you don't have to buy separately. Replacing the filter mesh is mandatory when installing a new fuel pump. Fuel pump warranty 12 months. Wherever you bought or installed a part, within a year you have the right to return it by simply providing him with a receipt or other document confirming the purchase date and price. Even if you are not a certified auto mechanic and installed the part yourself in your garage, just keep your purchase receipt and, if a problem arises, you can always return the part. Masuma & mdash; is a global brand of spare parts, components and consumables for cars. The main specialization of the brand: resource parts for post-warranty service of Japanese cars. Company strategy & mdash; to offer consumers the best ratio of reliability and price of spare parts. All products are manufactured to order, technology and under the control of the parent company Masuma Auto Spare Parts Co., LTD (Tokyo, Japan) at dozens of modern factories located in East Asia.