You have to pay to play
If you have a diesel, it is not a matter of if, but a matter of when you're going to have some expensive fuel delivery issues. It happens to all of us sooner or later if you keep one long enough or have one with any miles on it. When you start throwing a performance parts catalog at the engine, it makes this inevitable fate occur much much sooner. If someone sells you a ticking time bomb, would you not think that this bomb would go off shortly after the purchase? As in a couple week period?