I have a final drive/ring gear that I got because I'm going to install a CTR LSD in a USDM B16. I was told that some holes on the B16 final drive were too small and that I had to upgrade to an integra final drive. its not in the tranny yet so what do I look for on the gear itself to tell what the ratio is?

 

count the teeth on the ringgear then count the teeth on the pinion gear. Divide the ringear number by the pinion number. that will be the ratio u have.