Scorpion Exhausts 4-inch (100mm) Catted Turbo Downpipe / Sports Cat Front Pipe for BMW B58 1 & 2 Series M140i M240i (F20 F21 F22 F23) inc xDrive 2016+ - High Flow Catalytic Converter Performance Downpipe - SBMX074

Unlock serious flow and response for your BMW 1 Series and 2 Series B58. This catted turbo front section is the go-to upgrade for enthusiasts chasing faster spool, sharper throttle feel and a deeper performance soundtrack without going extreme. Designed for the B58-powered M140i and M240i platforms, it replaces the restrictive factory front catalyst section with a high-flow performance unit while keeping things straightforward to install.

Part number: SBMX074

Why enthusiasts choose this performance cat section

• Massive 100 mm 4 inch bore for outstanding gas velocity and reduced back pressure
• Genuine weight saving over stock - OE 4.8 kg vs Scorpion 3.1 kg
• Direct-fit to the factory system or Scorpion cat-back for seamless integration
• Transforms turbo response and mid-range pull on the B58 3.0 turbo engine
• Enhanced exhaust tone with a purposeful, sporty character

Fitment

• BMW 1 Series M140i F20 F21 - 2016 onward
• BMW 2 Series M240i F22 F23 - 2016 onward
• Compatible with xDrive AWD variants

Key specifications

• Pipe diameter: 100 mm 4 inch
• OE weight: 4.8 kg
• Scorpion weight: 3.1 kg
• Straight swap for the original front catalyst section

Tuning guidance

• Engine warning light EML may illuminate after installation
• Stage 2 ECU calibration remap strongly recommended for optimum results and to manage catalyst efficiency codes

Real-world results

We have fitted this upgrade to customer cars and the feedback is consistently positive. Owners love the sharper pick-up, smoother pull through the revs and the quality of the finish. It is a brilliant foundation for a Stage 2 setup on the B58 platform and pairs perfectly with an intake and intercooler.

Ideal search terms

BMW B58 catted turbo pipe, M140i front pipe upgrade, M240i performance catalytic converter, F20 F21 F22 F23 turbo outlet, BMW 1 Series 2 Series sports cat, performance exhaust front section, catted down pipe for B58, AWD xDrive compatible exhaust upgrade.

Professional installation

Want it fitted properly first time? Book installation with MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and availability.