This range of billet alloy fuel pressure regulators from Alpha are designed to replace the original Magneti Marelli external regulator. They are non adjustable but are available in a range of pressure ratings.
SYTEC SAR Regulator 1:1 (Black) fuel pressure regulator (SAR001BK)
Sytec Competition Adjustable Fuel Pressure Regulator - Black, 8mm Push On
Pressure Cooker Pressure Regulator
Bosch Pressure Regulator 0280160562
RIDEX Sensors High Pressure Side 3942S0012 Sensor, fuel pressure OPEL,FORD,FIAT,Corsa E Schrägheck (X15),COMBO Kasten/Kombi (X12)
Fuel Pressure Sensor METZGER Fits: VOLVO XC40