Milltek Sport HJS 300-Cell ECE Approved Sports Cat Downpipe for BMW B58 M140i M240i 340i 440i (F20 F21 F22 F30 F31 F32 F33, xDrive) Euro 6, 80mm, SSXBM1039

HJS 300 Cell Euro 6 Sports Catalyst Front Pipe for BMW B58 1/2/3/4 Series - Part No. SSXBM1039

Transform the way your B58-powered BMW drives with this UK-built performance catalyst section from Milltek Sport. Part number SSXBM1039 combines an HJS Tuning 300 cpsi Euro 6 compliant sports catalyst with a free-flowing 80 mm bore to reduce back pressure, sharpen throttle response and enrich the soundtrack while retaining road-friendly manners.

Precision manufactured from premium 304 stainless steel, this catted turbo outlet pipe slots straight in place using factory-style connections. It pairs perfectly with the original rear exhaust or a Milltek cat-back, delivering a deeper, more mature tone without the droning you do not want. We run this hardware on our own cars and customer builds and the feedback is consistently excellent for drivability and spool.

Highlights

• HJS 300 cell Euro 6 sports catalyst with ECE type approval for clean, efficient flow
• Direct bolt-on fit to OEM system and Milltek rear sections for quick installation
• 80 mm 3.15 inch bore for reduced restriction and improved turbo response
• Crafted in the UK from corrosion-resistant 304 stainless steel
• Refined performance sound with enhanced character under load
• Designed to help avoid EML warnings and noted as MOT friendly on 22.10.2018*

Compatible models

For B58 3.0 petrol models across F-series platforms, including xDrive:

• BMW 1 Series M140i F20 F21 LCI
• BMW 2 Series M240i F22 LCI
• BMW 3 Series 340i F30 Saloon and F31 Touring
• BMW 4 Series 440i F32 Coupe and F33 Convertible, including Gran Coupe

What is included

1 x Milltek Sport front pipe with integrated HJS Tuning 300 cpsi Euro 6 sports catalyst for B58 applications.

Real-world results

Installed by us on numerous B58 cars, this high-flow catted section delivers sharper pick-up, smoother mid-range pull and a richer exhaust note. Owners praise the quality, fitment and everyday usability.

Technical details

• Bore size: 80.0 mm 3.15 inch
• Material: 304 stainless steel
• Brand: Milltek Sport
• Part number: SSXBM1039

Fitting and verification

Professional installation available at MJ Modifications, Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

Before dispatch we perform a compatibility check. Add your UK registration or the last 7 digits of your VIN at checkout so we can confirm fitment.

Warranty

Covered by Milltek’s 1 year warranty.

*Designed to operate without triggering engine management warning lights and noted as MOT friendly on 22.10.2018. Final emissions testing and MOT outcomes can vary by vehicle condition and test procedure.

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