Fuel Pressure Regulator for 6.4 Gen III Hemi

Chuckbizkits said

I'm running an after market tank and fuel pump. Stock motor, factory EFI. The fuel pump is rated at 100PSI, 400LPH. What fuel regulator do I use?

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I would recommend a filter/regulator type, not an external adjustable one as you can put filter back by tank with return and just run one line forward. You didnt mention what year, the first two years had same pressure as a magnum and later ones bumped up to 58#. If its early, there is a 48# filter/reg and if its later than 04 use the LS type.