Review on Ford 3C3Z-9T517-AG Fuel Pressure Regulator Kit for F-Super Duty 6.0 - All You Need to Know About 3C3Z9T517AG by Manni Diaz

Everything fits well and fixed my leak but the truck works weird with that blue spring. I will have to reinstall the stock spring. Do NOT expect any increase in performance here. And vice versa. 3 stars for fixing the leak and having all the necessary parts, but the truck feels limited and works weird. For the price, I recommend buying this kit and using all the parts except the spring to fix the leak. Don't waste your money thinking you'll get a performance boost.