Designed in-house by Direnza engineers, our GPF delete downpipe is a direct replacement for the stock downpipe. Engineered to not only improve power and torque but also throttle response on the M135i.Manufactured from T304 grade steel. Fully TIG welded and feature CNC machined flanges. 3 Diameter for maximum gas flow giving optimum performance increases. Replaces restrictive GPF which restricts gaining more power from the 2.0L B48 turbo engine. BMW 1 Series F40 M135i 2019 onwards models. Please note: May require bypass software on vehicle ECU. This item is in the category "Vehicle Parts & Accessories\Car Tuning & Styling\Performance Exhaust\Performance Front/Down Pipes". The seller is "direnza*" and is located in this country: GB. This item can be shipped to United Kingdom, Austria, Belgium, Bulgaria, Croatia, Republic of, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Norway, Switzerland, Guernsey, Gibraltar, Iceland, Jersey, Liechtenstein, Monaco.