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Process West Intake Manifold Street Version ( Part Number:PRW PWIM002)

Process West Intake Manifold Street Version - Subaru STI 2004+

Manufacturer Part # PWIM002


MSRP: $1,935.00

In stock! Ships same day
Qualifies for free shipping!


The Process West range billet manifolds is a no holds barred manifestation of what is possible under the hood of a WRX/STI when perfect aesthetics meet high end performance. What you see here is the result of years of research and testing, multiple prototypes and a ground up redesign of the original ground breaking "Corsa Veloce" product range. Available in two major configurations they feature a full billet plenum with generous billet bell mouths and thick wall polished CNC mandrel bent tube components. High end TIG welding assembly makes them suitable for up to 100psi boosted applications. No other product comes close to this level of strength and detail.

The plenum volume and runner length combination has been selected for aggressive low and mid-range torque while opening up power higher in the rev range. The plenum volume is large enough for serious gains but is still compatible with factory AC. The Street version is suitable for any level of performance modification as they have conducted tests on completely stock engine/turbo/fuel system setups with approximately 9% gains in torque and power level, with the same percentage gain on highly modified setups running E85. For a fully streetable but aggressive setup while retaining the comfort of AC, the Street version manifold is the solution.


Please verify that your car is Drive by wire 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: No
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.




value of boxer
Golf 8 months ago
Although my project not yet finish but this intake manifold has been living in the room. It made my eng. room look very beautiful. I love my boxer so much.


2006 WRX (US)
scottgenex 3 years ago
This manifold is gorgeous. The welds are amazing and the attention to detail is fantastic. The first thing most people say when I pop the hood is wow. I was hesitant to install it on my car seeing as how fitment has only been confirmed for the STIs and not the 06-07 WRX. I did some thorough research and found that the throttle body and TGVs are identical and it bolted up just fine. I haven't seen it on too many street cars and found no installation instructions to follow. So this is a job for someone that has good mechanical know how and can do custom work. I did have to extend, replace and tie in a lot of vacuum lines, relocate some things, cut inter-cooler pipes and a few other odds and ends. It is pretty straight forward for the most part. I had to get a longer brake booster line to hook up properly, and as a helpful tip, remember that there is a one way valve pill inside the line that you will need to pull out. Be sure to put it back in the correct way or else you will have no power brakes (ask me how I know). I also bypassed the TB coolant lines since I felt no need for hot coolant going through my TB when the car doesn't see sub-freezing temperatures. I suggest marking (with tape and a pen) what vacuum and coolant lines go where as you remove them. I struggled with wondering where half of them went as I pulled them off in a frenzy to get this on. I paired this with Process West fuel rails so I could get some bigger fuel lines going. It has a lot more volume than the stock manifold, stands taller (especially with my Cosworth manifold spacers) and sits further back. Throttle response is definitely improved and intake sound is louder. Don't forget that you will need a custom tune after installing this to get the proper A/F ratios with all the added air coming in. All in all I am super satisfied with this product. It looks great under the hood and I have no doubt it will continue to impress me.Thanks RSD and Process West for all you do!
Verified Purchase

High quality
Shortieshort6946566 4 years ago
I got this intake and was blown away by its quality. The welds a flawless. The amount of Cnc work is amazing. It even comes ported. There is nothing I can find wrong with it bolts right up. It does stand much taller then the stock mani.

  • Q: Process West IM fitment   Bayne 7 months ago


    I’m going to be installing this on my 2016 Sti with an ETS fmic from your site. ETS 100-29WB, COBB intake+turbo inlet, and a Cobb 20g with the flex fuel kit. I was hoping you could tell me what things need to modified, and if there is anything else I will need? Thanks

    • A: Sounds to be a pretty straight forward install and you shouldn't need anything else. I would consult a tuner to ensure they are good to line and tune everything up but you look good to us!

      Tyler A. 7 months ago
  • Q: fitment and modifications  e chavez 2 years ago


    Will this intake manifold can fit with an aftermarket tmic? also, can i install this with a tgv delete kit?

    • A: This manifold is intended for use with front mount intercoolers. You might be able to customize a TMIC, but it would require modification. You can install TGV deletes with this manifold.

      Josh P. 2 years ago
  • Q: TGV  Inthenameofweez 2 years ago


    Does this manifold require TGV bodies to be present, or does it mount directly the to cylinder heads?

    • A: This manifold does require a TGV body to be installed.

      Jared A. 2 years ago
  • Q: 05 STi?  athene99_avdiel0929906 2 years ago


    What modifications (if any) would have to be done to a 2005 STi in order to make this work/fit?

    • A: This will not fit your 2005 STI.

      Josh P. 2 years ago
  • Q: 2005 JDM Subaru sti  Chathu 2 years ago


    I have a 2005 JDM subaru sti (Hawkeye). Will this fit the 2.0l? Regards Chathu

    • A: We are only able to confirm fitment on USDM STIs.

      Brady R 2 years ago