Cobb Stg 2+ Drivetrain Pkg w/ Weighted Shift Knob - Black Knob / White & Black Lockout - 2004-2021 Subaru STI 6MT PDM_auxiliary-lighting but in the lower RPM

but in the lower RPM to mid-range you'll find quite a bit of increase

5mm pipe diameter

Flow at 58 PSI: 630 LPH

Engineered for toughness and durability

Easy Care Non-Slip Rubber Surface Layer

Cobb Stg 2+ Drivetrain Pkg w/ Weighted Shift Knob - Black Knob / White & Black Lockout - 2004-2021 Subaru STI 6MT PDM_auxiliary-lighting but in the lower RPMThe Uppipe: The Restriction Between the Engine and the Turbo The Cobb Stainless Steel Uppipe for the Subaru replaces the restrictive factory unit between the exhaust manifold and the turbocharger. The factory uppipe contains a flex section that collapses over time and a catalytic converter that restricts exhaust flow before it reaches the turbine wheel. The Cobb uppipe removes both restrictions, improving exhaust gas flow to the turbine and reducing