Your 94-98 Dodge Ram has some hidden potential in the injection pump that you may or may not have known about.  Delivery valves are easy to change fuel delivery valves in the top of your injection pump.  Many people are familiar with 191s as an upgrade.  Well, we have a secret.  These DVs will give you 20 more horsepower and less EGT and smoke when compared to 191s.  These come packaged in a set of six and include the delivery valve holder o-ring.