Flexible couplings are engineered to isolate vibration generated by the engine, thereby relieving stress on your vehicle's entire exhaust system. This model is designed to reduce the premature cracking of the turbo manifold and downpipe when being used in turbo waste gate dump tube applications. By absorbing thermal expansion, stress between the header's wastegate flange and the downpipe are greatly reduced. Braided Inner Liner provide laminar flow while retaining flexibility in the coupling itself. The inner liner protects the bellows from premature failure. This stainless steel exhaust flex section is designed to slip over a 1.5" exhaust pipe for easy welding. Double Braid for extra long lasting durability. Flex joint is 4" long to fit in tight spaces.