The CTS High-flow catalytic converter downpipes for the BMW F90 M5 and M5 Competition, and the BMW G15 and G16 M8 and M8 Competition, are designed to maximise exhaust flow for the greatest possible power gain. Don’t compromise on performance and sound with factory parts.
The part has been designed using the latest CAD technology and therefore fits perfectly in place of the restrictive factory parts. It is manufactured from cast T304 stainless steel, hand-TIG welded and back-purged to ensure years of reliable operation. The pipework has a diameter of 80 mm or 3.15".
As well as unlocking the power and performance of the 4.4 Twin turbo, the high-flow catalytic converters make the car sound just as it should. When fitted with the factory exhaust, this delivers a louder and deeper growl with a much more pronounced crackle when downshifting. When upshifting, you’ll enjoy a confident punch through all 8 gears. To prevent the engine fault light from coming on, the correct Stage 2 tuning software must be used.
Features
- Piping with a diameter of 80 mm or 3.15"
- catalytic converter dimensions: 110 mm OD x 90 mm long, or 4.33" OD x 3.54" long
- Includes a 200-cell sports catalytic converter
- Designed and tested on a real car in real-world conditions
- Cast T304 stainless steel, TIG-welded and back-purged
- Replaces the restrictive factory parts
- Significant power boost with uncompromising performance
- Sporty exhaust note, subtle whilst cruising
- No drone when combined with the factory exhaust
- No connections for the OPF temperature sensor or OPF pressure sensor
Technical specifications
- Material: cast T304 stainless steel
- Pipe diameter: 80 mm or 3.15"
- catalytic converter: 110 mm OD x 90 mm long, or 4.33" OD x 3.54" long
- Cell density: 200-cell sports catalytic converter
- Manufacturing technique: hand-welded using TIG and back-purged
- Design: developed using the latest CAD technology
- Software: Stage 2 tuning software required
- Weight: 13.6 kg
Contents of the set
- CTS Sport catalytic converter Downpipe set 80 mm
- 200-cell sports catalytic converters
- Installation instructions
Frequently asked questions
Is tuning software required?
Yes. To clear the engine fault light that will appear, the correct Stage 2 tuning software must be used.
How does the car sound with these downpipes?
When fitted with the factory exhaust, the car sounds louder and deeper, with a much more pronounced crackle when downshifting and a confident punch when upshifting. The sound is sporty yet remains subtle whilst cruising.
Will I experience drone with the factory exhaust?
No, there is no drone when used with the factory exhaust.
What catalytic converters are fitted?
It features 200-cell sports catalytic converters measuring 110 mm OD x 90 mm in length.
Does this part fit a European car with an OPF?
The part fits, but is based on the US specification and does not have connections for the OPF temperature sensor or the OPF pressure sensor. European cars have had these sensors fitted as standard from 2019 onwards. If you wish to keep those sensors connected, this part is not the right choice.
