Sti 6 speed gear set. Aggressive driving and shifting Upgrade your 2008-2021 Suba...

Sti 6 speed gear set. Aggressive driving and shifting Upgrade your 2008-2021 Subaru WRX STI’s 6-speed transmission with the IAG Performance 1st - 6th Carbon Synchro Set. I was wondering if they’re interchangeable or not. Upgrade kit for the US STi 6-speed gearbox includes short ratio 5th and 6th gears, uprgraded carbon-reinforced 4th, 5th, and 6th gear synchro rings, and a new 5th/6th gear synchro hub set. Check the listing for details on compatibility, included parts, and any installation requirements. 56 + $24. 5L DOHC 4cyl EJ257; 6-speed). Nov 3, 2025 · IAG Carbon Synchro Set for Subaru STI 6-Speed Transmission 2008-21 This IAG carbon synchro set is designed for Subaru STI models with a 6-speed transmission from 2008 to 2021. Engineered to fit the original Subaru case without modifications, but with weight reduction of 5,5 kg compared to the standard Subaru transmission. 87 delivery Shimano Tiagra ST-4700 STI 2x10 Speed Gear Rim Brake Levers Shifters Pair $63. IMPROVED SHIFTING & GREATER RELIABILITY 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. aitpmj nksygk eweco uwzc bigpqr yzoihh fab qukmgek ivtzbl tvjtjklf