Review on 💪 Enhance Performance with 6.0 Blue Spring Kit Upgrade for Ford Trucks - F250, F350, F450, F550 2003-2007 - Replace 3C3Z-9T517-AG by Jeff Billingsley

In addition to improving the blue spring (which I won't mention here) this kit will replace any seals in the regulator that have failed. If you need to fix a regulator leak, get this kit and enjoy the benefits of the blue spring upgrade as well as fixing the leak! UPDATE: Installed unit as instructed, casing has a pinpoint leak and tiny fuel flow. spray from it. And that's far from a counter-surface. I had to reuse my OEM case. Tired of taking it back