Valved Exhaust System for Ford Focus RS Mk3 2.3 EcoBoost (2016-2018)
Configuration
Ford Focus RS Mk3 2.3 EcoBoost Valved Exhaust System (2016-2018)
Valves
Operated by remote control, factory-paired.
Estimated at 0.50 m from the outlet, 45°, 2,000 rpm with a warm engine. Allow ± 2 dB depending on the engine and measuring point. A 3 dB difference is audible in a direct comparison; 10 dB sounds roughly twice as loud.
Configuration guide
Sound intensity with the valves open, on a scale of 0 to 10.
| Configuration | Intensity |
|---|---|
| Decat downpipe + Rog cat-back | 10/10 |
| 100-cell sports catalytic converter + Rog cat-back | 9/10 |
| 200-cell sports catalytic converter + Rog cat-back | 8/10 |
| Rog cat-back only, factory catalytic converter retained | 7/10 |
| Factory exhaust, for comparison | 3/10 |
The Ford Focus RS Mk3 2.3 EcoBoost exhaust in detail.
Under the bonnet of the third-generation Focus RS, sold from 2016 to 2018, works a 2.3-litre turbocharged EcoBoost four-cylinder: 350 hp, 440 Nm, a sharp response and a tuning base highly prized in the Ford community. The page is dedicated to this RS; the Focus ST Mk4 and the EcoBoost Mustangs each have their own, and we use your VIN to check compatibility before manufacturing.
Between the turbo, which swallows part of the noise, and a factory exhaust calibrated for emissions standards, the RS’s voice does not reflect its temperament: it is often the first thing owners change. The Rog valved cat-back gives it a full, snarling tone, an audible turbo under load and crisp crackles when you lift off, valves open; once closed, the hatchback becomes as discreet as stock again.
With no welding, fitting is done with clamps and gaskets in about two hours, and the valves follow the factory control if the Focus has one, with the Rog remote, whose box sits in the boot, taking over otherwise.
The downpipe, which runs from the turbo and carries the catalytic converter, is offered under the “Manifold” option. On a non-remapped RS, it brings sound and a little weight saving, not horsepower; with an ECU remap, the published Stage 2 figures reach 394 hp and 546 Nm. Behind the RS’s turbo, a 200-cell downpipe keeps the original emissions control, a 100-cell will be accepted or not depending on the car and the rules in your country, and the decat version is reserved for track use, where the RS is often a regular. The Focus’s blued round tips finish a system in 304 stainless steel or titanium, the latter around 40% lighter and offered in brushed, gold or purple.
Ford Focus RS Mk3 2.3 EcoBoost exhaust specifications.
| System type | Valved cat-back (valve exhaust), built to your VIN |
|---|---|
| Vehicle | Ford Focus RS, third generation (Mk3) |
| Engine | EcoBoost, 2.3-litre turbocharged four-cylinder, 350 hp and 440 Nm |
| Years | 2016-2018 |
| Materials and finishes | 304 stainless steel or titanium; titanium in brushed, gold or purple |
| Valves | Factory valve control if the car has it, otherwise the Rog remote |
| Front section (option) | Downpipe with 200-cell or 100-cell catalytic converter, or decat (“Manifold” option on this page) |
| Fitting | Clamps and gaskets, no welding, about 2 hours |
| Manufacturing and delivery | Made to order, 20 working days, free delivery |
| Warranty | 3 years, parts and workmanship |
Questions about the Ford Focus RS Mk3 2.3 EcoBoost exhaust.
Can a Focus ST borrow the exhaust designed for the Focus RS Mk3?
No. The Focus ST Mk4 has its own page, with a different engine; the system shown here follows the geometry of the 2016 to 2018 RS Mk3 2.3 EcoBoost, which your VIN confirms before manufacturing.
After fitting, does the 2.3 EcoBoost in the Focus RS Mk3 need a new map?
Not for the cat-back, which the factory electronics accept as it is. With the downpipe, an ECU remap becomes the way to exploit the freed-up flow: the published Stage 2 figures take the RS from 350 to 394 hp.
On vehicle inspection day, in which configuration should the Focus RS Mk3 be taken in?
Valves closed and catalytic converter active, whether it is the factory downpipe or the 200-cell version: the hatchback then returns to a level close to stock. The 100-cell depends on the vehicle and your country’s rules; the decat downpipe only goes out on track.
200-cell or 100-cell: which downpipe for a Focus RS Mk3 used every day?
For everyday driving, the 200-cell: emissions control stays in place and breathing improves markedly. The 100-cell, accepted or not depending on the vehicle and your country’s rules, is aimed at RS models that are already tuned and remapped, not at those that sleep outside all year round.
Ford Focus RS Mk3 2.3 EcoBoost: Does a valved exhaust system drone?
No. With the valves closed, the gases flow through the whole rear silencer and the cabin stays calm at a steady speed. Our Rog exhausts are designed to avoid drone. Learn more: Why our systems stay calm on the motorway.
Ford Focus RS Mk3 2.3 EcoBoost: straight pipe or resonator?
On this model, two characters at the same price: the straight pipe for the raw sound of your engine, unfiltered, or the resonator for a rounder and slightly softer voice. Either way, the exhaust stays fully sporty. Learn more: Exhaust resonator: what does it do? Straight pipe or resonator, which sound to choose.
Rog expert guide
Ford Focus RS MK3: unleashing the EcoBoost, the complete exhaust system guide
The Focus RS MK3 is already a collector's car: 350 hp, a Drift mode and a devoted community. Its 2.3 EcoBoost has an explosive character that the factory exhaust, eager as it is, does not take all the way. Ours...
In detail
Rog Advisor
A question about this exhaust?
Fitment, sound, catalyst, valves, delivery: the answer comes straight away, with your configuration in context.
The Rog Advisor is an automated assistant trained on our product pages and answers. For an important decision, write to us: we confirm by e-mail.
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Rog presentation film: choosing your vehicle, Standard or Equal Length design, stainless steel or titanium, Z-Pipe, controlled valves, titanium and tip finishes, and support from choosing your configuration through to shipping.
THE Rog CRAFT
Our process.
From the first bend to the last check. The same care at every step.
-
Design
Designed for your vehicle.
Geometry matched to your model, carefully studied bends and precise mounting points. Everything starts with accurate design.
-
Manufacture
Crafted with precision.
Tube bending, part fitting and TIG welding: every joint receives the same care.
-
Finishing
Material, elevated.
The finish reveals the character of the metal. Stainless steel or titanium, depending on the options available for your vehicle.
-
Assembly
Every part in its place.
Components are assembled and adjusted. On valved systems, the mechanism is fitted, set up and tested.
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Inspection
Check. Then approve.
Geometry, welds, connections and gas flow: the key points are inspected before shipping.
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Shipping
Ready to join you.
Reinforced packaging protects your exhaust in transit. The final step before giving your vehicle a new voice.
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