Gates OEM Timing Belt Auto Tensioner Mitsubishi EVO 8 + 9 | T43130 STI_2015-2021 The COBB catback exhaust for

The COBB catback exhaust for the WRX & STI does not deviate from the factory emissions equipment and conforms to the SAE dictated 95-decibel exhaust noise level limit enforced by California

This permits the roll stiffness to be tuned for different situations without replacing the entire bar

It will however net you some serious gains through out the power band and improve throttle response

set your warning function to go off before you loose all your oil pressure

Gates OEM Timing Belt Auto Tensioner Mitsubishi EVO 8 + 9 | T43130 STI_2015-2021 The COBB catback exhaust forFitment: Mitsubishi EVO 8 + 9 The timing belt auto tensioner actuates a spring loaded lever to adjust the auto tensioner pulley (sold above) to automatically adjust for belt slack as the timing belt wears over time. Replacement of this component is required whenever the timing belt is removed from your 4G63.