This fuel pressure regulator (FPR) and fuel filter is a bolt-in kit designed specifically for BMW (E46) M3 2001-2006.
The OEM fuel filter is replaced with a high-flow Radium Engineering fuel filter. Depending on the element chosen, the filter can be compatible with all fuel types and/or can be cleaned and reused.
The OEM FPR is replaced with an adjustable high-flow FPR.