Cosworth High Flow Air Intake System

Part #: COS1 20019423


Brand: Cosworth
Carb Exempt: [

Carb Restricted Shipping

If an Item is CARB exempt it means that it has undergone an engineering evaluation by CARB (California Air Recourses Board) and is shown to not increase vehicle emissions. If an item is CARB Exempt it will have an EO (Executive Order) number associated with it. Even if an item has an EO number it is not guaranteed to be CARB exempt for your vehicle. It is important to confirm that your Year Make and Model fall under the CARB EO number associated with the part. That can be confirmed either by checking the CARB website or the manufacturers website.
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Filter Color: Blue
Filter Element Type: Dry
Filter Material: Cotton
Filter Reusable: Yes
Includes Airbox: Yes
Piping Color: Silver
Piping Material: Aluminum
Tuning Required: No
Mfgr. Warranty: 1 Year Limited Warranty
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.


Cosworth's High Flow Intake Systems feature increased surface area of the element, large smooth radius bent aluminum inlet tubes for superior air flow management coupled with a high flow air filter for maximum air flow and performance.

Each kit includes an integrated heat shield designed to isolate the air intake from engine heat - delivering cold air into the engine for superior power conversion. The filter element is large, conical in shape and engineered to dramatically reduce intake restriction resulting in additional power and torque.



Verified Purchase
2008 sti
lensflare 5 years ago
easy to install, great sound
Verified Purchase
2011 STI
EdekitRex 5 years ago
A little pricey but for the quality it's well worth it


  • AnswerQ: Specs  Big Bad Bionic Boy 5 months ago

    What are the dimensions of the tube? What's this kit rated to for horsepower? For example, ideal for normally aspired engines up to 250BHP and turbo engines up to 350BHP. Or would it be rated higher? Thank you.

    • A: We do not have dimensions on the MAF housing. This is only designed for turbocharged engines like the vehicles in the confirmed applications listing and is a great option if you require a better flowing intake for an upgraded turbocharger but can work with stock setups as well. Cosworth does not specify a power limitation to this intake.

      Nick S. 5 months ago

  • AnswerQ: fitment  randy 4 years ago

    any way you can verify with cosworth if this intake will fit with the cosworth FMIC you sell or do i need to go with a cold air?thank!

    • A: The FMIC from Cosworth is specific to work with the stock airbox and will not work with this intake due to the positioning of the air box and where the FMIC pipe has to run. You might be able to alter he heat shield, but at that point we are not sure what all is required or how much work it will take.

      Kirill C. 4 years ago

  • AnswerQ: Cleaning  stiboost 4 years ago

    Do you have any cleaning products on the site for the intake and how would you recommend cleaning it?

    • A: You can use something like the K&N 99-0624 system to clean it with

      Kirill C. 4 years ago

  • AnswerQ: cosworth air filter  mikestark4994970 4 years ago

    where can i get a replacement air filter for the Cosworth cold air intake?

    • A: Hello, We are able to order this part for you if you can please contact someone in our customer service department by phone, email or chat. Thank you.

      Tanner S. 4 years ago

  • AnswerQ: 2011 Sti  Derkz34 4 years ago

    Is this carb legal in the state of CA? I cant find any information on it. I must be looking in the wrong places.

    • A: Unfortunately at this time there is no CARB certification for this intake.

      Tanner S. 4 years ago

    • A: Cosworth has confirmed that this intake is not CARB approved.

      Zach G. 4 years ago