ETS Subaru MaxFlow V2 Headers V Band Flange - 2002-2007 Subaru WRX / 2004-2007 STI
ETS Subaru MaxFlow V2 Headers V Band Flange - 2002-2007 Subaru WRX / 2004-2007 STI
ETS
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PRODUCT DETAILS ▾
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.
Features
- 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.
WHY WE CARRY THIS ▾
We only list parts we’d run ourselves or recommend to a friend building a real car. If it feels vague, unverified, or inconsistent, it doesn’t make the cut.
- Fitment-first mindset — no “universal” roulette
- Brand reputation matters — we favor proven manufacturing
- Support that actually responds with real answers
WHAT TO EXPECT ▾
This is the clean path: correct fitment, clean install, and results that match the intent.
- Install-ready experience with correct mounting where provided
- Finish that holds up to real driving, not just photos
- Selections on this page drive the exact fitment shipped
TRUST, BUILT INTO THE PROCESS.
Anyone can list parts. We curate what belongs on a serious build. Our goal is simple: fewer surprises, cleaner installs, and confidence when you hit “Buy.”
Fitment checked
We prioritize vehicle-specific listings and clear selection logic so you’re not gambling on compatibility.
Brand discipline
Proven manufacturing and consistent quality matter more than hype. We bias toward what actually holds up.
Real support
If you have a question, you’ll get a human answer that helps you finish the build — not a copy-paste shrug.
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.
Features
- 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.
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