BRZ/FRS/86 Carbon Synchro Kit By Verus Engineering Synchrotech\’s BRZ/FRS/GT86 carbon synchronizer kit for your AZ6 manual transmission was developed from the need to improve shifting feel and time of the AZ6 manual. Through an improved friction surface, carbon, these synchros allow improved shifting at high and low RPM. These units will improve shifting feel, gear engagement, and gear longevity. Features Carbon Fiber Lining Brass Body Benefits Improved Engagement Improved Synchro Life Improved Shifting Improved Gear Teeth Wear Improved Oiling Improved Performance More Surface Contact Applications 2013 – 2021 Subaru BRZ 2017 – 2021 Toyota 86 2013 – 2016 Scion FR-S What\’s In The Box? 1 – 1st Gear Synchro, Dual Cone 1 – 2nd Gear Synchro, Dual Cone 1 – 3rd Gear Synchro, Dual Cone 1 – 4th Gear Synchro 1 – 5th Gear Synchro 1 – 6th Gear Synchro References Installation Instructions Warranty 1-year limited manufacturer defects warranty.