IAG Performance IAG 6 Speed Synchro Set 1 - 3 Brass / 4 - 6 Carbon Faced - Brass for 08-21 STI

Rebuilding your Subaru 6MT transmission or upgrading your gears? The IAG 6 Speed Synchro package for the 2008-21 STI includes a 1st, 2nd and 3rd gear brass syncronizer set as well as 4th, 5th and 6th gear carbon faced brass baulk rings. The OEM carbon faced baulk rings are known for improved shifting and longevity and are a popular upgrade when rebuilding GR and VA STI 6 Speeds.