Each Hose is designed to meet 3x their working pressure; Utilizing 4, 5 plies of DuPont Nomex / Aramid fiber (no inferior Polyester is used); Higher pressure applications have a Red Iron Oxide internal color; Flurosilicone elastomers and Fluorocarbon withstands oily residues; Spring loaded 300 Series Stainless Steel band clamping force remains consistent through heat cycles; Many specific kits for specific vehicles, turbochargers and intercoolers