Vibrant SS Flex Coupling with Interlock Liner and Mesh Braid 3in inlet Evasive Motorsports: Vibrant LiteFlex Coupling with Interlock Liner 3 Turbo Flexible Pipe Stainless Steel Coupling with Interlock Liner 2.5 Vibrant 61208 SS TURBO FLEX Coupling w Interlock Liner 4" Inlet Outlet. Vibrant Performance TurboFlex Couplings feature an internal Stainless Steel Interlock Liner to facilitate smooth flow and also protects the bellows from direct exposure to high temperature exhaust gases. Recommended for all high flowing, high temperature applications (e. g. forced induction). Catalog