This is the Blue Spring Kit from Sinister Diesel, and now it's available in California! Now CARB-compliant, the Blue Spring Kit for the 6.0L Power Stroke still retains its ability to increase your fuel pressure back up to where it should be from the factory. The added fuel pressure will help keep the injectors from outflowing the stock fuel pump, meaning you won't get air in the injectors, and your injectors may last much longer. In addition, you'll rev and spool up quicker. The kit includes all the O-Rings and hard parts to rebuild the fuel pressure housing. For more information, call 888-966-6543 or click here.
Photo credited to SinisterDiesel.com