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Process West Intake Manifold Street Version ( Part Number:PRW PWIM004)

Process West Intake Manifold Street Version - Subaru WRX 2002-2005

Manufacturer Part # PWIM004


MSRP: $1,935.00

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The Process West Street Version Intake manifold takes the art of fabrication and gives it a Hail Mary. This intake manifold is the result of years worth of real world research and testing along with several prototypes and redesigns to provide you with a billet plenum with CNC machined tubes. The tubes feature high-end TIG welding which makes this intake manifold suitable to withstand 100 PSI of pressure in forced induction applications. 

The plenum of this intake manifold has been fabricated from strong billet aluminum, with thick wall polished CNC mandrel bent tube components. 

The combination of the plenum volume and runner length has been selected for an aggressive low, and mid-range torque while providing more power in the top end range. The plenum is large enough for serious gains, however, it is still compatible with the factory AC unit. The Street Version Intake Manifold is perfect to accommodate all modifications, and on a stock engine, Process West found up to 9% in gains in both power and torque.

This intake manifold was designed with several vacuum ports, and will definitely be a great addition to your engine bay. 


Please verify that your car is Drive by cable throttle body before ordering. If you are unsure, please contact our customer service team.

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Brand: Process West
Finish: Polished
Installation Hardware Included: Yes
Material: Billet 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.


This product has no user uploaded media. You can upload your photo or video of your install by posting a review. Reviews:

  • Q: Process west  Static_sf5 4 months ago


    Will this particular manifold work with process West tmic? 02 wrx

    • A: No, This intake manifold will not work with a Top mount intercooler.

      Luis L. 2 months ago
  • Q: Manifold Spacers  AJ Cheetah 11 months ago


    Will this allow for a spearco tmic? And do intake manifold spacers come with this manifold in the box? From the looks of it, regular phenoluc spacers wont fit. Or could they be modified to fit? Since this is aluminum, are phenolic spacers even needed? Thanks Aj A

    • A: The Street intake manifold will not fit with any top mounted intercooler. The throttle position is lower and further toward the rear of the car with the Process West intake manifold. Phenoluc spacers install at the cylinder head so installing this manifold will have no effect on phenolic spacer installation.

      Process West 11 months ago
  • Q: Fitment  agdkjh 12 months ago


    Will this fit on a 02 wrx with a Grimmspeed TMIC?

    • A: Yes any regular TMIC replacement should be fine.

      Tyler A. 12 months ago
    • A: The Street intake manifold will not fit with any top mounted intercooler. The throttle position is lower and further toward the rear of the car with the Process West intake manifold.

      Christian B. 11 months ago
  • Q: JDM sti 07  Joy alam 1 year ago


    JDM sti does not use TGV and I don't have those either as my injectors go directly into the intake manifold. I can't see that in the pictures. Could u specify the correct part no to replace JDM manifold

    • A: Utilizing USDM spec TGV deletes will allow you to use this with your JDM spec motor.

      Jared A. 1 year ago
  • Q: Part number PWIM002 the same?  boosted06sti 1 year ago


    What's the difference between this and PWIM002 manifold? Both are listed as the "Street Version" on this website.

    • A: PWIM002 = drive by wire throttle body and PWIM004 = cable throttle body

      Brady R 1 year ago