aFe BladeRunner I/C Couplings and Clamps Kit for 11-13 BMW 335i (E9X) L6-3.0L (t) N55Reinforced Silicone: This intercooler hose is constructed from high temperature 5 Ply reinforced silicone material which meet or exceed SAEJ20 Standard. It uses built in metal spiral insert to withstand extreme amounts of boost pressure while keeping from expanding. Durable Coupling: Allow for expansion, movement, and extreme vibration between two hard pipes while reducing the possibility of connections coming apart or having your hard pipe or other