Milltek HJS 300 Cell Catted Downpipe / High-Flow Sport Cat for BMW 2 Series M240i F22 LCI 2015–2020 (B58 3.0) – ECE Approved T304 Stainless Turbo Front Pipe Performance Exhaust – Road Legal Bolt-On – SSXBM1039_1

HJS 300 CPSI Sport Catalyst Downpipe for BMW 2 Series M240i F22 LCI 2015 to 2020 - Part SSXBM1039_1

Transform the way your BMW M240i feels and sounds with this premium catted downpipe featuring an HJS 300 cell sport catalyst. Built from high-grade T304 stainless steel and designed as a precise bolt-on swap for the F22 LCI B58 platform, it delivers faster spool, sharper throttle response and a richer, motorsport-inspired tone while retaining road-focused refinement.

If you are hunting for a catted M240i down pipe, high-flow sport cat, HJS 300cpsi catalyst, Euro type-approved catalyst, or a stainless performance front pipe for the B58 engine, this upgrade ticks every box. It is engineered for durability, flow and everyday drivability.

Key reasons enthusiasts choose this sport catalyst

• ECE type-approved HJS 300 cell catalyst - a road-friendly, high-flow solution engineered for stringent European standards.
• T304 non-magnetic stainless construction - corrosion resistant, robust and built for long service life.
• Mandrel-formed pipework with optimised bore - improved exhaust gas velocity for a more responsive, freer-revving B58.
• Tuned acoustics - deeper, crisper exhaust character without intrusive cabin drone.
• Direct replacement fitment - designed to mate with factory hardware for a clean, hassle-free installation.
• Ideal for staged tuning on the B58 platform - supports future performance upgrades while keeping refinement.

Compatibility

BMW M240i Coupe F22 LCI 2015 to 2020 - B58 3.0 petrol turbo. Part number: SSXBM1039_1.

Built to perform, made to last

Crafted in the UK from quality T304 stainless steel with careful attention to flow and fit, this sports catalyst downpipe offers the durability, precise alignment and refined sound that discerning BMW owners expect. It is a performance-first, road-ready upgrade for the M240i that enhances character without compromising daily usability.

Workshop feedback

We run these HJS-equipped sport cats on our own and customer cars. Fitment is spot-on, the improvement in response is noticeable and the sound is purposefully sporty yet civilised. Our customers consistently praise the quality and drivability.

Professional fitting

Installation by specialists is recommended. For expert fitting and advice, book with MJ Modifications in Warwickshire. Request a quote at info@mjmodifications.co.uk.

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