BMW B58 Catted Downpipe 200 Cell High-Flow Sports Cat & Heat Shield - 4.5-inch SS304 TIG Welded - OPF/PPF Euro 5 - Fits M340i
BMW B58 Catted Downpipe 200 Cell High-Flow Sports Cat & Heat Shield - 4.5-inch SS304 TIG Welded - OPF/PPF Euro 5 - Fits M340i
BMW B58 Catted Downpipe 200 Cell High-Flow Sports Cat & Heat Shield - 4.5-inch SS304 TIG Welded - OPF/PPF Euro 5 - Fits M340i
BMW B58 Catted Downpipe 200 Cell High-Flow Sports Cat & Heat Shield - 4.5-inch SS304 TIG Welded - OPF/PPF Euro 5 - Fits M340i
BMW B58 Catted Downpipe 200 Cell High-Flow Sports Cat & Heat Shield - 4.5-inch SS304 TIG Welded - OPF/PPF Euro 5 - Fits M340i
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BMW B58 Catted Downpipe 200 Cell High-Flow Sports Cat & Heat Shield - 4.5-inch SS304 TIG Welded - OPF/PPF Euro 5 - Fits M340i

£749.00
£749.00
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BMW 540i 640i Downpipe - 200 Cell Hi-Flow Sports Cat and Heat Shield for B58 OPF PPF Models

Upgrade your B58-powered BMW or Toyota Supra with our 4.5 inch stainless steel downpipe featuring a 200 cell hi-flow sports cat and integrated heat shield. Precision built from SS304 aircraft-grade stainless steel and TIG welded in-house, this high-performance catted downpipe delivers faster turbo spool, sharper throttle response, reduced backpressure and a deeper, more aggressive exhaust note while remaining MOT friendly with Euro 5 rating.

Why choose this BMW B58 catted downpipe

  • 4.5 inch stainless outlet from the turbo for rapid spool and crisp throttle response
  • 200 cell hi-flow sports catalytic converter for maximum performance with emissions control
  • Mandrel-bent construction and maximised internal diameter for improved gas flow and reduced backpressure
  • Integrated heat shield to help manage under-bonnet temperatures
  • Significant weight saving versus the factory catalytic converter
  • Engineered from SS304 aircraft-grade stainless steel and TIG welded for strength and durability
  • Aggressive, motorsport-inspired exhaust tone without excessive drone
  • Direct fit for OPF PPF models - designed for OEM-style bolt-on installation

Real-world gains

We have fitted and tested this downpipe on our own B58 cars and customer vehicles, consistently seeing gains of around 20 to 25 bhp along with noticeably faster spool and a stronger mid-range. Feedback from customers has been excellent, praising both the sound and the performance transformation.

Compatibility - OPF PPF cars only

Fits the following B58 models with OPF PPF:

  • BMW G20 G21 M340i 3.0 285 kW 374 PS 2019+ OPF
  • BMW G22 440i 3.0 285 kW 387 PS 2019+ OPF
  • BMW G30 G31 540i 3.0 250 kW 340 PS 2018+ OPF
  • BMW G32 640i 3.0 250 kW 340 PS 2018+ OPF
  • BMW G11 G12 740i 3.0 240 kW 326 PS 2019+ OPF
  • BMW G14 G15 G16 840i 3.0 250 kW 340 PS 2019+ OPF
  • BMW Z4 G29 M40i 3.0 250 kW 340 PS 2019+ OPF
  • Toyota Supra MK5 A90 GR 3.0 250 kW 340 PS 2019+ OPF

Important note: This product is for OPF PPF cars only. If your vehicle does not have OPF PPF, please contact us for guidance.

Road use and emissions

The 200 cell hi-flow sports cat is Euro 5 rated and should pass an MOT emissions test when fitted. Designed as a road-legal performance upgrade for OPF PPF-equipped B58 vehicles.

Installation

Professional installation is recommended. Tolerances vary slightly between cars and exhausts can sit tight, but feedback on this product is that it is straightforward to fit. For expert fitting, book with Nforcd in Warwickshire. Request a quote at Sales@nforcd.com.

Optimised for BMW B58 performance

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