Cosworth High Volume Intake Manifold ( Part Number:COS1 20006438)

Cosworth High Volume Intake Manifold

MODEL # COS1 20006438
Manufacturer Part # 20006438


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The Cosworth Subaru intake manifold is a great upgrade for anyone who is looking to get the most power out of their car. Featuring a cast aluminum housing, this unit is able to increase air flow in high RPM on high powered cars where the stock intake manifold is creating a restriction.

Designed specifically to work with Front mount intercoolers. This unit is ideal for anyone looking to use it as a direct replacement of the stock manifold, or use it to rotate the intake manifold for front entry intercooler piping. Electronic throttle bodies only, not designed to work with cable actuated throttle bodies.
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Brand: Cosworth
Finish: Raw
Installation Hardware Included: Yes
Material: Aluminum

Mfgr. Warranty: 1 year
Condition: New Product
Return Policy:

RallySport Guarantee - 30 Days

Items that are covered under the RallySport Guarantee offer a 30 day no questions asked return policy.

RallySport Guarantee items may be returned within 30 days of the original invoice date and must include all the original parts and contents for a refund.

The RallySport Guarantee does not apply to products that have been modified, damaged, misused or abused. All returns require an RMA (Return Merchandise Authorization) Number, and freight charges are strictly non-refundable. For more information regarding our freight refund policy, please refer to our return policy page found HERE.



Amazing Product
Rick C. 1 year ago
We are running this Intake Manifold on our 2015 STI. Not only does it give us some nice power gains especially with our large GT38R Turbo, but it fits and looks amazing.

Verified Purchase

Cosworth Bling
chuysti2007 4 years ago
Just a wonderful looking intake manifold. I made great power too, I have an 07 sti with a Perrin GTX 3076r turbo kit rotated mount.
Verified Purchase

Love my Cosi Manifold
BobbyJ 5 years ago
After making an adaptor plate for the t-body I was able to make this fit my 04STi. I love my Cosi Manifold. Looks hot and sexy. Still need to tune the car to get 100% performance out of it. Thanks Rally Sports Direct for speedy service and delivery.

Nice bit of kit.
Al 6 years ago
Have this on my 2011 STi. Manifold has a coating on it that seems to keep some of the heat out. Vaccum plate can be rotated if you are running a rotated intake manifold making running hoses a little easier. Lots of ports for your FPR, gauges, etc. My small GT3076R seems to spool a little bit later, but makes big power (470 wtq @ 4250 / 442 hp ) I think this part will help out much more when I go to a GT35 or 40 series turbo. Had too many parts change (TGV Delete, larger injectors, new/better tune) when I installed this to provide a good before/after dyno plot.

  • Q: Fitment & Installation for WRX  Clikclikstewy 4 months ago


    I am curious as to what is needed for instal on a 2012 WRX with a Cobb FMIC or if this will even fit an 11-14 WRX.

    • A: This part is only confirmed to fit the STI models.

      Tyler A. 4 months ago
  • Q: Reverse  danyole 10 months ago


    Can this be reversed so that the throttle body is towards the front of the car? Also, would i need any extra parts if i do this?

    • A: You can rotate this manifold with no issues to face forward. It will require customer fabricated intercooler piping if mounted that way.

      Tyler G. 10 months ago
  • Q: Cosworth intake  Osvaldo 1 year ago


    Does my electronic throttle body fits? It is an STI 2015

    • A: It should work fine with the 2015 + STI models.

      Tyler G. 1 year ago
  • Q: 08 wrx  tonyinasubie 1 year ago


    will this fit on an 08 Wrx Sedan?

    • A: This is not confirmed to fit the 08 wrx sedan.

      Tyler G. 1 year ago
  • Q: 2011 sti   2011sti 1 year ago


    would this bolt on with a ture ? whats recommended to go along with it? this can you list it thanks

    • A: This will be a bolt on, and it is recommended that you get a custom tune after installation. You will need new gaskets for the intake manifold and TGV housings.

      Josh P. 1 year ago
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