Upgrade the shifting performance of your Honda K-series transmission with the Synchrotech SH-K20 3rd–4th Gear Hub and Sleeve. This precision-machined component is designed for K20 6-speed gearboxes, restoring smooth engagement and eliminating worn synchro issues during 3-4 shifts.
🔧 Key Features:
✔ Brand: Synchrotech
✔ Part Number: SH-K20
✔ Application: 3rd–4th Gear Hub and Sleeve Assembly
✔ Fitment:
• Honda / Acura K20 6-speed transmissions
• Common in Civic Si, RSX Type-S, and other K20A/K20Z platforms
✔ Material: High-strength chromoly steel
✔ Design: OEM-style fitment with upgraded metallurgy for longevity
✔ Usage: Suitable for street, track, or performance builds
✅ Why Upgrade?
⚙️ Replaces worn or damaged factory hub & sleeve
🔧 Ensures clean, positive shifts between 3rd and 4th gear
💪 Built to handle high RPM and aggressive driving
🛠️ Direct-fit installation – no modification needed
🏁 Trusted by tuners, racers, and rebuild shops worldwide
📦 What’s Included:
(1) Synchrotech SH-K20 3rd–4th Gear Hub and Sleeve Assembly
Packaged for safe shipping
New and unused — 100% genuine Synchrotech
