2008-2010 Subaru WRX and STI Cobb External Wastegate Uppipe and Dump Tube

The COBB Tuning External Wastegate Uppipe Kit replaces the stock restrictive uppipe and allows the external wastegate to control turbine-bypass-gasses instead of the restrictive internal wastegate that is integrated into the turbo housing. The stock internal wastegate can easily be overwhelmed as power levels rise, which can lead to uncontrollable boost creep. COBB Tuning offers a complete solution for this issue with the release of the new COBB External Wastegate Uppipe Kit designed to work with a TiAL’s 44mm Wastegate and optional products such as the innovative COBB Adjustable Internal Wastegate Bracket, the COBB 3-Port Boost Control Solenoid and the COBB Boost Control Solenoid Fitting Upgrade Kit also available from COBB Tuning.

 

The COBB External Wastegate Uppipe Kit is a bolt-in replacement for the stock restrictive uppipe. The uppipe itself is constructed of 2-inch diameter heavy-duty 14-gauge stainless steel with smooth mandrel bends and finished with substantial half-inch thick 304 stainless steel flanges. The turbo flange includes pre-installed studs. The internal dimension of the uppipe is 1.86-inches and perfectly matches the ID of the header gasket for optimal exhaust flow. Precise CNC mandrel bending allows tight tolerances to be met during production, ensuring proper fitment without the need for a flex section, which is a common point of failure in aftermarket uppipes. The dump-tube is constructed of 2-inch 16-gauge stainless steel with smooth CNC mandrel bends. Both the uppipe and the dump-tube use precision stainless steel v-band flanges and v-band clamps to securely fasten them to the TiAL wastegate. All flanges are meticulously TIG welded.

 

When you are ready to step up to high boost and big power in your Subaru, the COBB Tuning External Wastegate Kit will give you the precise boost control needed for reliable power production.

 

Features

 

• 1/2" 304 stainless steel flanges
• 2" OD 1.86" ID 14-gauge uppipe
• ID of uppipe matches ID of gasket for optimal flow
• Precision v-band flanges for wastegate attachment
• Precise CNC mandrel bends for perfect fitment and smooth bends
• Solid, strong construction without weak flex section
• TIG welded

• 2" OD 16 gauge stainless steel dump-tube
• Smooth CNC mandrel bends
• Precision v-band flanges for wastegate attachment
• TIG welded