IAG 1st - 6th Carbon Synchro Set for 2008-21 Subaru STI 6-Speed

Whether you are rebuilding your six speed manual Subaru STI transmission or looking to upgrade your gearing, IAG’s 1st-6th Carbon Synchro Set will provide smoother shifting and increased reliability. Aggressive driving and shifting can lead to worn out or damaged synchros, which in turn, can cause gear grinding or even eventual damage to the transmission housing. The IAG Carbon Synchro Set is an essential upgrade for Subaru drivers looking to replace worn out synchros and to improve the shifting and performance of their STI.