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Kthnxbye Racing

Tomei Expreme Unequal Length Exhaust Manifold - Subaru Models (inc. 2002-2014 WRX / 2004+ STI)

Tomei Expreme Unequal Length Exhaust Manifold - Subaru Models (inc. 2002-2014 WRX / 2004+ STI)

Regular price $801.00
Regular price $890.00 Sale price $801.00
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Exhaust Manifold Kit Expreme EJ Single Scroll WRX/STI Unequal Length with Titan Exhaust Bandage

Tomei introduced the high efficiency 4-1 as against the STD 4-2-1. The exhaust efficency of the standard exhaust manifold is not perfect. Tomei 4-1 type exhaust manifold has high efficency. You could see the change of dramatically driving feeling. The complete equal length is good for the exhaust intervention but reduce the turbine performance and increase the exhaust resistance. Contrary to that, the not-equal length exhaust manifold can lead the efficiency of other cylinders. Tomei designed not-equal length to keep the boxer sound. The clear sound which got dry further by change to the diameter of the support pipe and the stainless steel quality of the material is pulled out and the good feeling could be obtained at the acceleration. Tomei designed the Lost Wax type strength flange. They are perticular about the welding and exhaust efficiency is improved very much. Tomei selected SUS304 stainless steel which is lightweight and rust-proof. They prepared bolts, gaskets, and easy and full instruction manual for privator.

Fitment Information:
2004-2021 Subaru STi
2002-2014 Subaru Impreza WRX  
2004-2013 Subaru Forester XT
2005-2009 Subaru Legacy GT


  • Unequal length design
  • 304 Stainless steel construction
  • 4-1 high efficiency design
  • Includes gaskets and hardware and thermal heat wrap
  • 2.5mm thick tubing
  • Up pipe included

Notes: Say it louder for the people in the back SuBiE rUmBlE bRo. Do you want to make sure everyone knows you're driving a Subaru? This is the ticket my guy. Made of a super high quality stainless steel construction, this header will last longer than most EJ engines will (in factory form :) ). You'll make a little more power with it (not as much as you would with the Tomei Equal Length Header) but still some. And you'll look cooler under the car, for everone who's into that. 

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