Extreme Turbo Systems

ETS Subaru STI V2 MaxFlow Header

  • Your Price
  • Regular price $1,495.00

PART NUMBER: 200-10-EXM-201

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The wait is over! Extreme Turbo Systems is proud to release our new Subaru STI V2 MaxFlow Exhaust Header for the 2004+ Subaru STI.

We designed our ETS V2 MaxFlow Header to be a direct factory replacement header. We start off with large 1 7/8 primary runners that come together in a true low angle 4-1 merge collector that then flow into a huge 2.5" secondary for maximum scavenging and exhaust flow.


  • 1 7/8" primary runners with 2 1/2" secondary for maximum flow.
  • CNC mandrel bent runners.
  • Custom .100 USA made thick wall tubing for durability.
  • Low angle 4-1 merge collector for maximum flow and exhaust scavenging.
  • Slip fit connection for ease of removal and installation.
  • 2-Bolt , 3-Bolt, or V-band up pipe flange options.
  • Stock replacement design.
  • Low profile design for maximum clearance. 
  • Confirmed Fitment with XL Oil Pans like IAG and KillerB
  • Surfaced flanges for a leak free seal.
  • 304 Stainless steel construction.
  • 100% built in house and made in the USA.

Check out this awesome video by Dustin Williams.

Customer Reviews

Based on 23 reviews
Dave G.
Really nice piece

I was in the market for a updated header to replace my swain coated gtspec uel from 2005. Definitely glad I went with this ETS v2 maxflow. Big tube primaries with some beefy flanges. Overall construction is top notch. 👌 5 stars all day

abel matadamas
Insane quality

Very easy install + amazing quality!
Tuner said if get some great power out of this too!

Vasilios Pelehrinis
Ets max flow headers

I had killer b headers on before pushing 600 hp but when I told my tuner I’m looking for 800 plus he said let’s swap ur headers out and upgrade some fuel stuff I’m waiting for tune date to see what these upgrades lay out.

Kevin Jackson (JL)

ETS Subaru STI V2 MaxFlow Header

Yoandi Prado
Best subaru header you will ever need.

Looks and feels very well build with heavy duty materials, the vband up pipe set up is amazing and easy to connect. Shout out to everyone at extreme turbo systems!


As usual ETS crushes with their product. We’re expecting to make additional WHP on less PSI with these headers…and the quality is far superior to any other. Look no further than these headers



Ask a Question
  • Will these fit a 2002 WRX with a EJ257?

    Yes, this manifold should be bolt on compatible with the EJ205, EJ255, and EJ257 engines.

  • Will these headers fit around an IAG extended oil pan?

    Yes! We have an IAG pan here in house that we can use for mockup. If you order one, please include that it will be used with an IAG pan in the order notes.

  • Does this fit a 2006 wrx whith the oem oil cooler

    There shouldn't be any reason why this wouldn't work on your vehicle, we have oil cooler provisions on our jig for the OEM units.

  • if i order the ETS SUBARU STI V2 MAXFLOW HEADER with the v band flange does it come with an additional flange and clamp for the up pipe?

    Yes, we include a mating flange and a v-band clamp with the v-band flange option.

  • Are these unequal length?

    The header is *nearly* equal length, but not perfectly symmetrical. It still provides a small amount of chop at idle, will have significantly less "Subaru Rumble" since it is no longer a true UEL manifold.

  • For those of us that daily drive their car (including often sloppy winter conditions): Can I still use the OE splash guard/undertray with these headers?

    This manifold fits under the car in the same way that the OEM one does, the undertray goes on just like stock.

  • Do you need a tune after installing the header?

    A tune is not *required* to run this header, but you will not see the full benefit without adjusting the tune. 

    See this post from Prime Motoring for more information - https://www.instagram.com/p/CRmnG-7Ai7K/

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