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.
FeaturesÂ
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.Â
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.
Aside from axleback/catback exhausts, clamps & couplers, and ETS Merchandise; we are unable to ship directly into California. These parts will likely need to ship to our location first and then out to you. Additional shipping charges will apply.
*Anodized intercoolers may take about 4-5 weeks, as the anodizing process is outsourced to a third-party company.
*Titanium pipes may take up to 3-4 weeks to ship if they are not in stock.
⚠️ California Proposition 65 Warning:
This product may expose you to chemicals known to the State of California
to cause cancer or reproductive harm.
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Unused items in brand-new, original packaging can be returned within 30 days. While standard refunds incur a 25% restocking fee, we will waive this fee entirely if you choose store credit or an exchange for your next upgrade.
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To ensure every customer receives brand-new, untampered components, parts that have been installed, modified, or used are non-returnable. Custom builds, special orders, and wheel/tire packages are considered final sale.
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Fitment guides and tools are helpful—but your car is unique! Some trims and options aren’t always listed, so if you want 100% confidence that a part will fit, our team is happy to double-check for you. We take the guesswork out of your purchase by standing behind our expertise.
Verify Your Build:
If this product doesn't list your specific vehicle data, simply reach out to support@autohousesupply.com. We will manually verify compatibility for you.
Our Promise:
When we confirm a fitment in writing and it doesn’t work for your application, we cover the return shipping and exchange it at no cost to you.
Questions? Send us your Year, Make, and Model via our Contact Form and we’ll get you a definitive answer so you can buy with confidence.
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