b16a5 500whp, hurt my gearbox this sunday, mugen diff. crown and my pinion shaft got sheared. so i need:
mugen diff crown 66 teeth
type r pinion shaft (4.4 ratio)
HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!

 

You don't need a Mugen ring gear (not sure they ever even made one for the B16). You just need a B16A 4.40 FD (matched, not a ring gear and countershaft from two different transmissions). Since you've already broken a stock FD though its time to upgrade.

 

i cant find any of these parts in jamaica, where can i source them? p.s im pretty sure its a mugen diff. the tranny came from a 96/97 civic type r but the diff was changed

 

Get a pic of it and measure the inner diameter of the ring gear.