AVOTurboworld's ceramic coated unequal length turbo exhaust manifold is designed for the Single Scroll Turbocharger 2.5L EJ engine setups. It is a slightly larger replacement that will help with quicker response over the standard factory OEM manifold and lessen the back pressure when increasing the boost. It is constructed from 1 3/4" purge tig welded stainless 304 2mm thick tubing and 12mm laser cut flanges. Includes exhaust manifold gaskets. The AVOTurboworld Up-Pipe with Flex is not included in this kit.