This rack plug for your 94-98 Dodge 5.9L Cummins is
for use in your P7100 injection pump. This custom-manufactured rack
plug allows 21 mm of rack travel (internal pump element throttle
movement), whereas the factory plug allows just 18 mm. Typical power
gains from this modification range from 25 to 40 hp.
Not recommended for 215 hp P-pumps.