Overview Reviews Product Description Fuelab 53501-4 Universal Purple EFI Adjustable Fuel Pressure Regulator Fuelab 53501-4 Product Videos Custom Field Product Reviews Write a Review Write a Review × Fuelab Fuelab 53501-4 Universal Purple EFI Adjustable Fuel Pressure Regulator Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *