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Invidia 2015+ Subaru WRX / STI Gemini/R400 Single Layer Quad - HS15STIGM4SSFind parts that fit my vehicle

Item TL-64284
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      Product Information

      Description, Q&A

      Description

      Far more engineering goes into the design of an exhaust system than many realize. From a performance perspective, there is a fine balance between exhaust back pressure and exhaust gas velocity. Too large a diameter pipe, and low down power and torque is sacrificed (particularly on naturally aspirated cars), too small a diameter or added restrictions and bottlenecks in the system, and the engine is unable to push gases out of the combustion chamber efficiently, reducing power and torque. There are many other technical aspects such as 'scavenging effect' which are beyond the scope of this document.

      It's not as simple as just strap on a drain pipe and gains for days. A 'quality' exhaust system maximizes performance gains by design.

      but the point is

      Invidia HS15STIGM4SS

      CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

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