1. The check valve upgrade provides optimal flow while reducing pump noise, and the isotropic super-finishing provides lower amperage draw and quieter operations. 2. Fuel pumps have gone through rigorous testing and meet or exceed the specifications of theproduction pump your vehicle was built with Perfect replacement for your failing or broken fuelpump to avoid any emergencies on the road 3. Part Number: GSL392 4. Eliminate engine misfires and hesitation from Fuel Starvation 5. Applicable models: LS