BMW M2 (F87) | Akrapovic | Downpipe w Cat (SS) F33 420i The hose is made from

The hose is made from high-quality multi-ply silicone with wire-wound reinforcement

including signals sent to the E-Gear and S-Tronic ECU

They do not work with RS4 B5 specific downpipes but these can be adapted with use of a RS6 flange

There are solid turbo inlet pipes on the market

BMW M2 (F87) | Akrapovic | Downpipe w Cat (SS) F33 420i The hose is made fromDownpipe w Cat (SS) was tested and developed together with Evolution Line (Titanium) system. Made from high quality stainless steel and fitted with a sporty catalytic converter, no remapping is needed for this performance upgrade. The high flow downpipe produces an enhanced sound that delivers a pure racing emotion and fantastic feedback at high revs, without any unwanted drone.