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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.

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.

Check out this awesome video by Dustin Williams.

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ET

ETS (Extreme Turbo Systems) is a premier manufacturer of high-performance automotive components, specializing in turbo kits, intercoolers, exhaust systems, and other performance parts. Renowned for precision engineering and exceptional quality, ETS products are designed to maximize power and reliability for street and motorsport applications. Trusted by enthusiasts and racers, ETS delivers cutting-edge solutions for ultimate performance.

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