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Message: [QUOTE="Justin@DP-Tuner, post: 380377, member: 1413"] It bolts to the fuel filter housing. On the stock setup, there is a fuel pressure regulator on the side of the filter housing. It utilizes a spring to regulate the pressure. With the FRx, you replace the old fuel pressure regulator with the FRx. The lines coming off of the FRx regulator go to the end of the fuel rails. This enables fuel to freely flow through the heads without hitting a dead and. When the fuel rail has a dead end, there is no where for air to escape except through the injectors. I'll take a pic of mine installed to show you what I am talking about. [/QUOTE]

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