To improve power, COBB set out to develop a highly efficient and quiet supercharger system. Utilizing a Rotrex compressor, COBB’s engineering team set out to develop a system that would improve the vehicle’s engine performance throughout its entire power band without negatively effecting engine reliability, NHV, or drive ability. To do so, a sophisticated mounting system was designed that allows retention of all the factory pulleys and reduces any harmonics that might create vibrations under certain operating conditions. To allow for sustained periods of boost, as experienced when towing or climbing mountain grades, an air-to-air intercooler was incorporated in a side-mounted position to further cool the incoming charge air. For the effort, COBB has been able to extract 320 HP and 270 lb-ft of torque from the Subaru 3.0L flat-6 engine.
Tieing the system together, custom ECU programming was developed that can easily be installed using COBB’s AccessPORT hand held programmer. The AccessPORT stores multiple ECU programs which provides the installer or end-user the ability to calibrate their engine computer for different fuel octanes or modes of operation; such as towing, high performance, fuel economy, and valet modes. OEM-like driveability is achieved through COBB’s unique ability to fully control the factory engine control system.
COBB’s signature cat-back exhaust system finishes out the Power upgrades and gives the driver an auditory connection with the engine. The exhaust note is deep and sporty while remaining tastefully mellow.