Reinforced Silicone These coupler hose features 5 - Ply reinforced high temperature material which meet or exceed SAEJ20 Standard. Coupler Hoses Allow for expansion, movement, and extreme vibration between two hard pipes while reducing the possibility of connections coming apart or having your hard pipes or other equipment break. This kit contains heavy - duty 5 - Ply couplings and high quality stainless steel spring loaded T - bolt clamps for strength. Note This coupling kit fits aFe intercooler tubes only (46 - 20148 - B 46 - 20149 - B