Fuel Pressure Regulator
Fuel Pressure Regulators:
- M40/M42B16/18: 3.0 bar
- M20B27: 2.5 bar
- M20B20/23/25: 3.0 bar
- M50/M52B25/28: 3.5 bar
- S50B30/32, S52B32: 3.5 bar
A plug-in upgrade for the M20 fuel rail is the 0280160263 Porsche regulator, which is 3.5 bar.