Review on 🔧 Optimize Fuel Delivery: Delphi FP10021 Fuel Injection Pressure Regulator by Alfredo Nosrac

Perfect match for my 2002 Silverado 1500 5.3L V8. Be sure to remove the very small o-ring on most of the inside before fitting the new regulator. If you do this very carefully and correctly, the work should take about 15 minutes. I bought a cheaper one first and it was completely out of spec. Things went very well in Delhi when there was enough pressure. This is the part you definitely don't want to skimp on.