Ford Focus RS Mk3 2.3 EcoBoost (2016-2018) Turbo-Back / Cat-Back Exhaust System – 3" 76mm T304 Stainless Steel, Valved or Non-Valved, Resonated or Non-Resonated, Sports Cat or De

Unleash the RS soundtrack and flow

Transform your Focus RS Mk3 with a complete stainless steel system that runs from the turbo outlet right through to the dual tips. Built in mandrel bent T304 pipework at 76.2 mm diameter, this upgrade frees up exhaust flow, sharpens response and delivers the deep, aggressive note enthusiasts want from the 2.3 EcoBoost 350 PS platform. It looks the part, sounds incredible and has the durability to match.

Why owners choose this system

• 3 inch, 76.2 mm T304 stainless construction for long term corrosion resistance and high flow
• Replaces front section, factory catalyst, centre and rear assemblies for a true turbo to tailpipe solution
• Choice of resonated or non resonated centre for refined cruise or louder track-inspired tone
• Available with high flow sports catalyst or de cat front section
• Valved and non valved configurations to suit your drive mode preferences
• Precision fitment with all required hardware and gaskets supplied, turbo gasket not included
• Dual 4.5 inch polished slash cut tips sit perfectly in the RS diffuser

Sound options to suit your build

The resonated setup keeps a subtle, sporty character at light throttle with a deeper voice when you lean on it. The non resonated option turns up the volume for a rawer soundtrack, more turbo whistle and those trademark crackles and pops the Focus RS is known for.

Valve control, your way

• Valved: retains OE valve operation, so changing drive modes continues to alter the exhaust loudness as standard
• Non valved: removes valve control for a consistent, carefully tuned tone at all times

Real world development

Engineered for performance, this system gives the 2.3 EcoBoost room to breathe. Development testing showed a notable weight saving versus the 24.3 kg OE assembly, with the non resonated de cat turbo to tail setup cutting mass by 13 percent. Sound testing recorded up to 100 dB on the 4,000 rpm static test with the non resonated de cat configuration and up to 101.5 dB when using the Venom system with resonated centre and the OE catalytic converter. Expect a deeper idle, a richer mid range and an addictive tone under load.

Fitment and compatibility

Designed for the 2016 to 2018 Ford Focus RS Mk3 2.3 EcoBoost. Also commonly searched as Focus RS MK3 exhaust upgrade, Focus RS 2.3 performance system, RS Mk3 stainless steel exhaust, Focus RS downpipe back, Focus RS catless exhaust, Focus RS sports cat exhaust, Focus RS valved exhaust, Focus RS non resonated system, Focus RS resonated system, 76 mm Focus RS exhaust.

Legal and compliance notes

• The de cat version is sold for motorsport and off road use only worldwide
• The sports catalyst replaces a factory emissions device and is not EC homologated, it may not meet current road emission regulations in your area

What’s included

Front section, catalyst replacement of your choice, centre section, rear section and dual tailpipes, with all relevant fittings and gaskets supplied. Turbo gasket not included.

Fitting service

Want it installed professionally? Book fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a tailored quote and quick lead times.

What owners say

We have fitted this system on customer cars and the feedback has been outstanding. Customers love the deeper tone, the quality of the welds and materials, the clean fit and the way it complements mapping and other breathing upgrades.

Watch and listen

Non resonated turbo to tail with de cat

Non resonated turbo to tail with sports cat

Interior sound, non resonated turbo to tail with de cat

Non resonated cat back example

Images may show alternative parts or configurations.