MTC Motorsport BMW B58 4.5 inch Stainless Steel Downpipe with 200 Cell Hi-Flow Sports Cat and Heat Shield
Upgrade your BMW B58 with a premium MTC Motorsport catted downpipe for serious performance and sound. This 4.5 inch stainless steel downpipe with 200 cell hi-flow sports cat and integrated heat shield is engineered for OPF and PPF models, unlocking sharper throttle response, faster turbo spool and a more aggressive exhaust note while reducing backpressure and temperatures. Built from SS304 aircraft-grade stainless steel and TIG welded in-house, this is a high quality performance exhaust upgrade that delivers.
Why choose this BMW B58 catted downpipe
- 4.5 inch stainless pipe straight out of the turbo for rapid spool and sharper throttle response
- Noticeable power gains of around 20 to 25 bhp from our testing
- More aggressive, deeper exhaust tone that sounds truly amazing without going over the top
- Lower temperatures and reduced exhaust backpressure to relieve the turbocharger
- Substantial weight saving versus the factory catalytic converter
- Mandrel-bent 200 cell sports cat for maximum gas flow and strong mid-range torque
- SS304 aircraft-grade stainless steel, TIG welded in-house for strength and durability
- Integrated heat shield for a neat, OE-style finish
Fitment - OPF and PPF models only
Designed for BMW and Toyota applications with the B58 3.0L engine and OPF or PPF:
- BMW G20 G21 M340i 3.0L 285 kW 374 PS 2019 OPF model
- BMW G22 440i 3.0L 285 kW 387 PS 2019 OPF model
- BMW G30 G31 540i 3.0L 250 kW 340 PS 2018 OPF model
- BMW G32 640i 3.0L 250 kW 340 PS 2018 OPF model
- BMW G11 G12 740i 3.0L 240 kW 326 PS 2019 OPF model
- BMW G14 G15 G16 840i 3.0L 250 kW 340 PS 2019 OPF model
- BMW Z4 G29 M40i 3.0L 250 kW 340 PS 2019 OPF model
- Toyota Supra MK5 A90 GR 3.0L 250 kW 340 PS 2019 OPF model
Tested performance and customer feedback
We have tested this MTC Motorsport downpipe on B58 cars and found increases of around 20 to 25 bhp. Customers love the sharpened throttle response, quicker spool and the more purposeful exhaust note. Feedback also highlights an easy fit on OPF models and a quality finish.
Installation and support
Professional installation is recommended, as factory exhaust alignment can vary and tolerances can be tight. Feedback on this product indicates it is very straightforward to fit. Want it fitted by specialists We offer fitting at Nforcd in Warwickshire. Request a quote at Sales@nforcd.com.
Legal and emissions
These should pass an MOT emissions test when fitted. They are road legal and Euro 5 rated.
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