The Cosworth Subaru High Volume Inlet Manifold is cast from aluminum featuring large tapered runners with radiused inlets for improved air flow. Plenum volume has been substantially increased and tuned for power. Engineered for easy installation and is the key to making big power. The Cosworth EJ257 plenum is designed for use with the 2004-2009 STI engines equipped with electronic throttle control. The plenum is not designed for use with any cable-actuated throttle body EJ20/25 applications. This plenum is designed to replace the factory Subaru plenum in vehicles equipped with an aftermarket front-mounted intercooler (FMIC) kit. Throttle body position remains stock, ensuring fitment with any brand FMIC kit designed for the stock throttle body and intake manifold. For 2008-2009 Subaru STIs the Cosworth FMIC kit (p/n 20005378) is highly recommended.
The Cosworth Tumble Generating Valve(TGV) Delete Kit is designed to maximize airflow to your engine by eliminating the obstructions inherent to the OEM TGV intake ports. The TGV delete's are made of a fiber reinforced polymer to insulate the cylinder head from the intake tract, providing your engine with a cooler, denser charge of air. To further increase performance, the Cosworth TGV delete's are port matched to our CNC cylinder heads and intake manifold. This product is a direct fit for the 07+ Subaru STI due to the top feed injector design and due to a revision to the upper bolt pattern of the TGV, specifically moving the center two M6 holes. With our manifold and top feed injectors, the TGV delete kit will work without issue on most WRX/STI applications.
The Cosworth Twin Plenum inlet manifold for the Nissan VQ35DE has been engineered for increased performance featuring increased plenum volume for improved high rpm power with torque enhancing velocity stacks to maintain mid range performance. With performance derived from countless hours of development including computational fluid dynamics, the Cosworth Twin Plenum Inlet manifold is perfect for both normally aspirated and forced induction applications. Performance increases will be significant on engines with improved exhaust and intake system including optimized ignition/fuel maps with increased maximum rpm limiter. Cast from lightweight aluminum alloy with machined from solid aluminum end caps with a hard anodized finish and all required mounting hardware.
This part comes from Cosworth USA. We suggest you read any and all documentation and technical specifications related to this part that can be found on their web site located here. Images are used for reference only as product details / colors may change. If you are unsure, please ask before ordering. Please click on an application below to see the shipping costs for each item.