20006438 - Cosworth High Volume Inlet Manifold


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Part #: 20006438
Notes: High Volume Inlet Manifold
Your Price: $1,399.00

All Fitments

SUBARU
Year Model SubModel Cylinders Liter Aspiration Eng Desg. Fuel Notes
2004 - 2014 IMPREZA WRX STI
WRX STI LIMITED
WRX STI SPECIAL EDITION
H4 2.5 T EJ257 ALL
2015 - 2017 WRX STI ALL ALL ALL ALL ALL ALL

Product Description

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.

Features

  • Substantially increased plenum volume
  • Large, tapered runners with radius inlets
  • Tuned plenum volume and runner length/taper
  • Over 10% increase in flow
  • Integral vacuum manifold for connection of brake booster, boost gauge, MAP sensor, boost controller, etc.
  • Will work with standard or forward mount electronic throttle body configurations
  • Stock throttle body location for compatibility with most aftermarket FMIC kits

Product Reviews

Cossie Intake, Wednesday, October 15, 2014

I run one of these on my Cosworth long block. I picked up a set of TGV deletes to match port everything. Sometimes I just like to sit and stare at it all day.
Made great top end power.

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