SUBARU IMPREZA WRX STi 4-2-1 HEADER 2002+.
The manifold is a 4-2-1 manifold designed to provide extensive midrange and top-end power gains.
Our manifold features T321 Stainless Steel piping, mandrel bends, and CNC precision cut flanges.
The turbocharger relies on energy from the exhaust flow to rotate its blades.
By pulling additional energy that was otherwise wasted by the factory manifold we can transfer that to the turbo to decrease spool up times and improve power.
Strong gains in both HP and torque can be expected with the addition of this manifold, especially with high horsepower applications.
The Uppipe is the perfect complement to the Header.
The large 2.3"" piping allows for more exhaust gas volume, and the lack of a flex-section or restrictions ensures maximum exhaust gas velocity to spool the turbo.
-Includes all necessary gaskets.
-Direct bolt-on Fully polished
-Huge weight reduction
-Significantly increase torque and horse power over the mid and high RPM range
-Increase throttle response