Leave returnless fuel system or add a return line. I'm ditching the secondary rail and injectors and running ID 850's in the primaries for E98 or pump. The debate is to see if the oem regulator is adjustable enough for this, or cut it off, run a return line out of there to a fuelab regulator, and bulkhead the oem fuel basket cap for the return. Is the oem regulator adjustable, or am I better off adding a return line? Any help is greatly appreciated!
Here is the primary rail with the ID850's installed:
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