Downpipes 135i-335i-Ζ4 35i
The Downpipes that Speed & Style has are made of 100% stainless steel. They include the sockets for the lambda sensors at the factory locations. They are available with HJS Tuning free flow catalysts with 200 hives compared to 400 of factory-fitted ones. With the free flow of exhaust gases, horsepower increases while the Turbo resistance decreases, resulting in higher available torque at a lower engine speed. There is also a non-catalytic version.