I had an unexpected request come from PRE Racing in Portland Oregon. They were asked to test these new ETS Headers on my Stage 4 IAG closed deck engine running the ETS Rotated turbo kit w/ a Precision 6266. Trust me, Killer B makes a great header and allowed us to push 35psi to 742whp & 590wtq.
These ETS headers shined by adding 65wtq at 30psi and averaging about a 10whp gain through the whole rpm range. These headers spooled the 6266 at 4,200rpms (About 400-600rpms lower) and now having me questioning bigger injectors and more fuel supply. I am highly impressed with the results and feel like 800whp is achievable with more fuel.
Keep in mind, results will vary, as My-STi has very specific modifications made to accommodate air flow, as well running E85 with a flex fuel kit.
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.
QUESTIONS & ANSWERSAsk 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.