2.5″ Hump hose with Full-Race Logo. Used for turbo to intercooler, or turbo to intercooler pipes connection. Hump-hose design allows for significant amounts of movement and misalignment. If you have a turbo car that keeps blowing couplers off, this is a great solution. This coupler is constructed from 2 ply fiberglass reinforced silicone with a .110″ wall thickness.