AVO Equal Length Twin Scroll Headers Ceramic CoatedAVOTurboworld's ceramic coated equal length turbo Exhaust Manifold with Up Pipe with Flex is designed for the STI Twin Scroll Turbocharger 2. 0L EJ engine setups. It is a larger replacement that will help with quicker response and more top end 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 loss wax flanges. Includes