Quote:
Originally Posted by BR3W CITY
Unless its flex fuel, no. Return or returnless, they all ran the 58-62 rail pressure. Only the Flex fuel trucks (metal rail) ran the lower pressure. In 2003 you could get a plastic return rail, a metal flex fuel rail, or if it was a late-production run you could get the returnless plastic rail.
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The only fpr that will fit a 2003 return system will only do 52 pounds pressure.