Synchrotech Pro-Series Carbon Lined Synchro's provide improved lock angle, stronger brass body, more surface contact, stronger bonding, improved oiling. This all helps in with higher RPM shifts. Synchrotech® 1-5 Pro Series Carbon Synchro Set
*Carbon Fiber Lining *Stronger Brass Body
*Improved Lock Angle *More Surface Contact
*Stronger Bonding *Improved Oiling
Fitting B Series 92-01 GSR ITR B16 (Y80 S80 S4C S21 Y21 YS1 B16 B17 B18C)