Radium Engineering Fuel Filter Kit – Focus RS 16–18 (With Filter)

The Radium Engineering Fuel Filter Kit is a direct-fit, high-performance replacement for the factory fuel filter on the 2016–2018 Ford Focus RS. Located between the low-pressure electric fuel pump and the high-pressure mechanical fuel pump (HPFP), this upgraded filter reduces restriction, increases fuel flow, and supports modern fuels like E85 and methanol.

Vehicle Compatibility:

• 2016–2018 Ford Focus RS
  Note: Not compatible with Focus ST

Key Features:

• Direct replacement for OEM in-line fuel filter

• Installs in minutes – no cutting or drilling required

• Less restrictive design reduces pre-filter pressure by 3–5.5 psi

• Reduces pump strain, current draw, and fuel temperature

• Supports a 2–4.5% increase in fuel flow with aftermarket pumps

• Fully compatible with ethanol (E85), methanol, race fuel, and gasoline

• Available with two filter media options:

Filter Media Options:

• 20-0332-03 – Stainless Steel Element, 10 Micron – Cleanable and reusable

• 20-0332-05 – Microglass Element, 6 Micron – Higher filtration efficiency

A vital upgrade for any modified Focus RS, especially those running ethanol blends, larger injectors, or aftermarket fuel pumps.