A Milltek Sports Cat replaces your restrictive catalytic converter with a much free flowing, higher performance sports cat. As restrictions in the exhaust system tend to bottleneck performance, this will unlock big potential power gains and is normally required when you are moving up to a Stage 2 remap.
- Replaces restrictive OE catalytic converter
- 200 or 100 Cell Per Square Inch for better flow rate
- Essential part of higher stage upgrade package
All petrol road vehicles have been supplied with a Catalytic Converter (cat) since the 90s. This is good for the environment, but a factory cat is generally the most restrictive part of the exhaust system. When you start looking at tuning the exhaust system, this makes it an obvious place to look for improvements.
Typically the cat supplied with your car will have a somewhat restrictive 400 or 600 cell per square inch (CPSI) substrate. By replacing this with a premium 100 or 200 CPSI substrate you increase the amount of open area in the cat and allow exhaust gasses to flow more freely through the cat. In most cases, the more efficient sports cat still allows the vehicle to pass emissions testing.
Allowing freer flow of exhaust gases allows for both higher engine output and quicker spool times on turbocharged engines.
Generally speaking replacing your stock cat will also require a remap, as the ECU will be getting different readings from the Lambda sensors in the exhaust which will probably read as an error. Normally an upgraded cat is required for the higher performing higher stage remaps we're listing.
An upgraded cat is an essential part of the highest performing upgrade packages.
Please check your local laws and regulations before ordering any replacement for your vehicles catalytic converters.