The V2 MaxFlow Header will provide smooth exhaust flow to improve the power on the Subaru STI. 

ETS V2 MaxFlow Header w/2-Bolt Flange

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Header Specs:

• 304 stainless steel construction
• 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
• Stock replacement design
• Low-profile design for maximum clearance
• Surfaced flanges for a leak-free seal
• 100% built in-house
• 2-bolt flange type
• Unequal-length type

 

ETS V2 MaxFlow Header

From the factory standpoint, the OEM exhaust manifold is super durable and robust, but it leaves much more room for improvement in terms of performance. It is very heavy and limited with flow. 

ETS has designed a super performance unit with their V2 MaxFlow Header. This header combines smooth bends and durable stainless steel construction to allow for an unobstructed flow path for the exhaust gases to escape. This will increase both the horsepower and the torque while reducing the turbo lag. Additionally, the unequal length design will really promote that Subaru rumble.