Fuel pressure regulator and fuel filter (BMW E46 01–06) stainless

There are 4 interchangeable 10-32 threaded vacuum port fittings included to cover all scenarios:

1. Barbed fitting: A black zinc-plated 3/16″ (5mm) barb machined from high-strength steel, compatible with 5/32″ (4mm), 3/16″ (5mm), and 7/32″ (6mm) vacuum hose.

2. 3AN male fitting: A black zinc-plated steel adapter compatible with 3AN hose ends.

3. Push-to-connect fitting: A nickel-plated brass fitting with Buna-N O-rings, compatible with 1/4″ OD hard plastic tubing.

4. Vacuum plug: A black oxide stainless steel screw used to maintain constant (non-dynamic) fuel pressure.