BMW Decat & Sports Cat Fitting BMW Downpipe Installation & Performance Exhaust Upgrades | Warwickshire (Marton), Midlands UK | Nforcd

BMW catless and high‑flow catalyst downpipe fitting by MJ Modifications

Unlock sharper throttle response, quicker turbo spool and a richer exhaust note with MJ Modifications in Marton, Warwickshire. Our specialist team carries out precision turbo downpipe upgrades on BMW petrol turbo engines, delivering clean fitment, no leaks and results you can feel on the road and track. If you are searching for a trusted Midlands workshop for a BMW turbo outlet pipe upgrade or performance catalyst install, you have found the right place.

Why choose MJ Modifications

• BMW exhaust specialists who work on these platforms daily, from F‑Series to G‑Series.
• Correct O2 sensor handling, new gaskets and fixings, accurate torque settings and perfect alignment for a rattle‑free, worry‑free finish.
• Improved flow and response from quality catless pipes or 200‑cell and 300‑cell high‑flow catalytic converters.
• Smoke‑tested for tight seals, heat shielding where appropriate and a thorough post‑install check.
• Customers consistently praise the transformation in drivability and sound after fitting.

What we install

Professional fitting of catless turbo outlet pipes and performance catalyst downpipes for BMW petrol turbo models, subject to compatibility. Common platforms include B58, B48, S55, N55 and N54 engines, covering models such as M140i, M240i, M340i, 340i, 440i, 540i, Z4 M40i, M2, M2 Competition, M3, M4, 135i, 235i, 335i and 435i, plus X3 M40i and X4 M40i. If you are building a quick road car or a track‑focused project, our fitment process ensures it is done right first time.

How we work

• We can supply and fit quality hardware or install parts purchased through us.
• V‑band and flanged applications covered, with care taken around studs, clamps, heat shields and lambda sensors.
• Where required we can fit spacers and advise on software calibration for CEL management and optimal performance.

Booking and pricing

Work is carried out at our Warwickshire workshop in Marton with fixed‑price options available. For an accurate quote, availability and to book your slot, email info@mjmodifications.co.uk with your registration, model, engine code and the part you want installing.

Helpful info

• Cat delete versus performance catalyst: a catless pipe maximises flow and sound, while a high‑flow cat retains a catalyst with reduced back pressure.
• Legality and MOT: catless and some performance catalyst setups can be for off‑road or track use only. Always check local regulations and MOT requirements before booking.
• Tuning: after hardware changes, many cars benefit from suitable software calibration for the best results.

Location and coverage

MJ Modifications, Marton, Warwickshire. Convenient for Coventry, Leamington Spa, Rugby, Warwick, Banbury, Birmingham and the wider Midlands.

Ready to transform your BMW

Get a fast, professional fit from a team that cares about the details. Email info@mjmodifications.co.uk to request a quote and book your BMW turbo downpipe upgrade with MJ Modifications.

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