Extreme Turbo Systems

ETS Subaru STI V2 MaxFlow Header

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  • Regular price $1,250.00

SKU: 200-10-EXM-201

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Customer Reviews

Based on 3 reviews
Love the gains!
Great header, right price.
Preliminary Data Results - 2013 STi (aka: Mysti)

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 or Vband up pipe flange options.
  • Stock replacement design.
  • Low profile design for maximum clearance. 
  • Surfaced flanges for a leak free seal.
  • 304 Stainless steel construction.
  • 100% built in house and made in the USA.


Ask a Question
  • Will this fit with the killer b oil pan on the 15+ sti's?

    yes it does

  • Can the stock plastic splash shield be retained with this header?

    Yes it does.

  • Are these consideredequal length

    Yes it is.

  • I want to buy these headers with a matching v-band, flanged, up-pipe thats externally waste gated. Do you guys offer it? I can’t for the life of me find it on y’all’s website. Also, will this bolt up to any manufacturers up-pipe, so long as it’s a v-band flange?

    This in v-band only works with our up-pipe and we have to build them at the same time. 

    We can sell the up-pipe separate from our rotated turbo kit if you want to build the rest of the kit your self.

  • Will a coated option be available?

    We do have options to have it coated. This would need to be a custom option. Please call if you want to order this with coating.

  • Will this clear the CSF radiator with built in oil cooler

    We do not have confirmed fitment with that exact setup. I see no reason why it wouldn't fit though.

  • Will you guys consider making a vband upipe to pair with this as an option?

    We do make a V-Band up pipe that pairs with this header. You can order our turbo kit and select the v-band option and it will bolt right up to this as long as you order them at the same time.

  • I want this header for my stock STI, which flange do I choose?

    The 2 bolt option is a direct replacement for the stock header.

  • Hello guy’s. What’s the inside diameter for the new V2 Max Flow header?

    The internal diameter of the 1 7/8" runners are 1.65 (.100 wall thickness).

  • How can we get this shipped to california

    No, headers have to be CARB approved and our is not CARB approved.

  • Will this fit a Cobb up pipe and a killer b oil pan

    It works as a replacement for the stock header and does clear the killer b oil pan. So, it should work with those.

  • Are you guys considering to add a 3 bolt flange option for us folks running the tomei headers?

    Yes, we are considering it if the demand is there.

  • This maybe a stupid question but would this be consider an Equal Lenght header.?

    Yes it is.

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