Ramair Air Intake Kit for Ford Focus MK4 1.0/1.5/2.3 ST – Pleated Cotton Filter

Ramair Performance Air Intake Kit – Ford Focus MK4 1.0 / 1.5 / 2.3 EcoBoost ST (PRK-389-BK)

This Ramair Stage 1 air intake kit is a straightforward bolt-on upgrade for the Ford Focus MK4. It replaces the restrictive factory air intake system with a freer-flowing setup, helping your engine breathe more easily. The result is improved throttle response – meaning the car reacts more quickly and crisply when you press the accelerator – along with a more engaging induction and turbo sound under load.

It is designed specifically for the Ford Focus MK4 and third-generation Ford Kuga (2019 onwards) fitted with Ford’s EcoBoost turbocharged petrol engines: the 1.0, 1.5, and 2.3 ST units. The kit makes use of the original cold air intake (CAI) routing from the factory, so cold, dense air is still drawn in from outside the engine bay rather than hot air from around the engine. This is better for performance and helps the engine run efficiently.

What Is Included

• Bespoke black powder-coated heat shield – keeps heat away from the filter for cooler, denser intake air
• Ramair pleated cotton performance filter – washable and reusable
• Black powder-coated sensor pipe – retains your existing engine sensors
• Silicone coupler – connects components securely
• Full fitting hardware with step-by-step instructions

Why a Pleated Cotton Filter?

Ramair’s pleated cotton filters are designed to flow more air than a standard paper filter while still filtering out dust and debris effectively. Unlike disposable paper filters, they can be cleaned and reused, making them a longer-term investment. When the filter needs attention, Ramair’s dedicated filter maintenance kit (CK-003) is compatible and makes the cleaning process simple.

Real-World Benefits

Gains from a Stage 1 intake upgrade are typically modest and most noticeable in throttle feel and sound rather than headline power figures. You can expect a sharper, more responsive feel through the rev range and a more pronounced induction and turbo noise – particularly satisfying on the 2.3 ST. This kit will not transform the car on its own, but it is a solid first step in a performance upgrade plan and pairs well with other Stage 1 modifications such as an ECU remap.

Installation is designed to be straightforward, with all necessary hardware and clear instructions included in the kit. No specialist tools are required for most users.

Important fitment note: This kit is designed for the Ford Focus MK4 and third-generation Ford Kuga with 1.0, 1.5, and 2.3 EcoBoost engines from 2019 onwards. Please use the vehicle lookup tool on this site or check the Vehicle Fitment tab to confirm compatibility with your specific model and engine before purchasing.