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The Sinister Diesel Blue Spring Kit for 2003–2007 Ford Powerstroke 6.0L includes the updated Blue Spring, a billet aluminum spring housing and a billet fuel filter cap to restore fuel pressure and prevent leaks. Most 6.0L trucks see about a 10 psi pressure increase, helping protect injectors; the kit ships with new gaskets, O-rings, installation hardware and a 1/8" NPT port on the cap for fuel pressure testing.
Sinister Diesel 03-07 Ford Powerstroke 6.0L Blue Spring Kit w/ Billet Spring Housing/Fuel Filter Cap
