BMW M135 F7x Armytrix Downpipe With Sports Catalyst

Available in high-quality T304 stainless steel, either without any specific coating or with a ceramic coating designed to reduce heat propagation, this Armytrix downpipe with sport catalytic converter for BMW M135i F7x delivers a significant power gain without affecting low-end torque. Featuring a 3.15" / 80mm diameter, this downpipe equipped with a 200-cell sport catalytic converter features an O2 sensor spacer to help limit error codes caused by replacing the factory catalytic converter.