The Synchrotech SO-Y1-3B — Honda Acura B16 B18 Cable Y1 S1 3rd-4th Sleeve, Brass Synchros and Springs — is a premium brass upgrade engineered for smoother, faster, more durable shifting than factory components. Built to Synchrotech's Pro Series standards and trusted by builders for high-horsepower street and track transmissions.

Premium brass synchros:

• OEM-grade replacement with improved consistency
• Reliable engagement for street and rebuild applications
• Direct-fit — no transmission modification required

Application: Honda Acura B16 B18 Cable Y1 S1 3rd-4th Sleeve, Brass Synchros and Springs

Backed by Synchrotech quality and shipped fast from Speedzone Performance.