Ford Focus RS (MK3) Cat Back Performance Exhaust

Unlock the soundtrack your Focus RS deserves with a premium stainless exhaust upgrade engineered for the MK3 2.3 EcoBoost. Transform throttle response, unleash a deeper, more aggressive tone and refresh the rear end with a precision-built 3 inch system that replaces the mid and rear sections for a direct-fit, bolt-on install.

Crafted from high-grade T304 stainless steel with smooth mandrel bends, this rear system is designed to maximise gas flow and deliver a richer burble at idle that turns into a crisp, hard-edged note under load. It is the perfect after-cat replacement for drivers who want a sharper, more involving drive without drone.

• 3 inch 76.2 mm T304 stainless pipework for improved flow and durability
• Direct-fit after-cat replacement for the centre and back box sections
• Choice of sound levels: resonated for refined sporty tone, non-resonated for a louder, rawer soundtrack
• Available with valve control to retain drive mode sound changes or non-valved for a consistent note
• All required clamps, gaskets and fittings included for hassle-free installation
• Designed for the Ford Focus RS MK3 2.3 EcoBoost 350 PS
• Backed by a full manufacturer guarantee for peace of mind

Why MK3 Focus RS owners choose this exhaust

Drivers report a deeper, more characterful tone with trademark crackles and overrun burbles that suit the RS personality. The smoother, freer-flowing 3 inch pipework helps the turbo breathe, while the dual exit tailpipes sit perfectly in the factory diffuser for an OE-plus look. Our team has fitted these systems to customer cars and the feedback has been consistently excellent for both road use and spirited weekend drives.

Choose your sound profile

• Resonated centre section includes a silencer in the mid pipe for a subtle yet sporty note, ideal for daily driving and motorway use.
• Non-resonated centre section deletes the mid silencer for a louder, more assertive soundtrack and pronounced pops on overrun.

Valve options explained

• Valved version keeps the OE exhaust valves working with drive modes. Switch from a calmer tone to a rowdier note as you change modes such as Eco to Race.
• Non-valved version removes the factory valves for a single, consistently sporty sound. This does not affect engine operation or drivability.

Fitment and compatibility

• Application: Ford Focus RS MK3 2.3 EcoBoost 350 PS
• Configuration: after-cat rear system replacing centre and rear sections
• Tailpipe options: dual exit with bold polished tips for a clean factory-style finish

What’s in the box

• Stainless steel mid-section and rear section
• Relevant clamps, hangers and gaskets
• Installation instructions

Sound and quality you can trust

This system delivers a lower, richer tone than stock and comes alive under throttle with a pitch-perfect performance note. Built to last from corrosion-resistant T304 stainless with precision welds and mandrel bends, it is a quality-focused upgrade backed by a full guarantee.

Professional fitting available

Want it installed by experts who know the Focus RS inside out? Book fitting with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and availability.

Keywords customers use: MK3 Focus RS exhaust system, 3 inch catback kit, stainless performance exhaust, RS 2.3 EcoBoost rear section, valved sports exhaust, non-resonated straight-through, resonated mid silencer, dual exit tailpipes, polished tips, mandrel bent pipework, bolt-on fit, UK performance parts.