B-Series Carbon 1-5 Synchro Set, Acura GSR, Type R. Honda Civic SI

After completing years of research this is the next generation of Synchros which surpasses the overall performance of our previous Carbon Coated Synchros. Our new Carbon Synchros have and improved proprietary composition that promotes Quick & Smooth shifting in addition to a more dependable braking surface. With a stronger brass body and improved locking angle, our Carbon Synchros will take your tachometer to the limit!

This Carbon Synchro Set will work in the following transmissions:
YS1, Y21, Y80, S80, S4C, S21 (GSR/ITR CIVIC SI)