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Ferro Carbon offers lower rear rates and higher torque values than other competitive materials
For reference
produced an estimated maximum gain of 32 horsepower @ 5400 RPM and an estimated increased in torque of 31 ft-lbs @ 5400 RPM
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Cobb Bypass Valve Rebuild Kit - 2002-2014 Subaru WRX / 2004-2014 STI Toyota-86-2020 running richCobb Engineering for the GD GR VA STI The Cobb Bypass Valve Rebuild Kit 2002 2014 Subaru WRX 2004 2014 STI for the 2004 2021 Subaru STI is a direct fit upgrade developed by Cobb Tuning as part of their comprehensive platform specific lineup for the GD GR VA STI. Every Cobb product for this platform is engineered around the factory fitment points and validated on Cobb's own development vehicles the result is hardware that installs without modification
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