BMW M235i (F22) Cat Back Performance Exhaust

Unlock the full character of your BMW M235i F22 with a premium stainless rear system that sharpens response, deepens the soundtrack and elevates everyday driving. This high quality T304 set-up replaces the factory centre section and back box from the catalytic converter rearwards, delivering a purposeful tone, proven performance gains and a smart dual-exit finish that looks right at home on the 2 Series coupe.

Built from true 76.2 mm 3 inch mandrel-bent tubing with smooth flow and no crush points, this upgrade is engineered for flow and durability. Independent testing of the louder configuration has shown meaningful improvements of up to +10 bhp and +16 lb ft, alongside a useful weight saving of around 20 percent versus the original system. The result is sharper throttle response, stronger mid-range pull and a soundtrack that makes every shift and overtake feel special.

Choose your sound level to suit your build:

• Resonated includes a centre silencer for a refined, sporty note with long‑journey comfort.
• Non-resonated removes the centre silencer for a more pronounced, aggressive tone. In controlled testing, interior levels were carefully managed with no unwanted cabin drone, while the exterior note is markedly more exciting.

At the tail end you get a choice of beautifully finished dual 3.5 inch tips, available in inward rolled baffled or inverted highly polished styles, giving the rear of the M235i a broader, more purposeful stance.

Why enthusiasts choose this BMW 2 Series M235i exhaust upgrade

• Performance you can feel thanks to free-flowing 3 inch T304 stainless tubing and precision bends.
• Audible excitement with a deep, motorsport-inspired tone and no cabin boom.
• Lighter than stock for a welcome drop in mass and sharper dynamics.
• Tailpipe options to match your preferred look, both with a premium polished finish.
• Supplied with all required gaskets and fittings for a straightforward installation.
• Covered by a manufacturer guarantee for peace of mind.

Looking to go further later on With the cat-back in place, it pairs perfectly with a high-flow sports catalyst or large-bore de-cat front pipe for maximum flow and an even more intense soundtrack.

We have installed this system for multiple customers at MJ Modifications and the feedback has been excellent. Fit, finish and sound quality are consistently praised, and the transformation in character is immediate from the first start-up.

Note: Product photos of the fitted system show the non-resonated version.

Fitting and support

Want it professionally installed Book your car in with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a fitting quote and availability.

Key specifications at a glance

• Vehicle: BMW M235i F22
• Configuration: From catalytic converter rearwards, replaces centre and rear sections
• Material: T304 stainless steel
• Tubing diameter: 76.2 mm 3 inch
• Options: Resonated or non-resonated centre section
• Tailpipes: Dual 3.5 inch, inward rolled baffled or inverted polished
• Typical gains tested on non-resonated system: up to +10 bhp and +16 lb ft
• Approximate system weight: 16.32 kg vs OE 20.38 kg

Hear it in action

Example of BMW M235i sport exhaust non-resonated with de-cat

Interior sound example non-resonated with de-cat

If you are searching for a BMW M235i F22 stainless steel exhaust, performance back box upgrade, BMW 2 Series M235i resonated system, non-resonated rear section, dual exit tips, 3 inch mandrel bent system or a cat-back for sharper sound and power, this is the proven choice for road and track enthusiasts alike.