Scorpion BMW M140i High Flow Sports Cat Downpipe (F20/F21)Scorpion Exhausts BMW M140i Downpipe with High Flow Sports Catalyst is an essential upgrade for both sound and power. A huge benefit of the sports cat is that it's more likely to be emission compliant over a decat downpipe. Reducing the restriction created by the factory catalytic converter helps to reduce turbo lag and quicken up the throttle response. As for installation, we offer professional fitting at our London workshop. Get in touch to arrange