Am I the only one to see that is it pretty obvious why those bolts broke... You said you have a broken shaft. You also said you felt a vibration like a flat tire pulled over checked your tires then drove 300 kms home like that. I would place money that you did break a shaft, and the vibration because of it on the drive home snapped off those bolts. Personally I would replace the bolts and re-use the OBX diff. I made over 500whp with my OBX diff. and did multiple HARD launches just to beat the hell out of it and never once had a problem with it. Sorry for your luck but I'm sure you are going to spend alot of money for no reason when all you need is those bolts for a few dollars... Hell PM me the measurements on them and I'll see what I can find for you.

that suck i would stick with the ODX diff also

Any update on this, did you buy a quafie, or stick with the obx? If you go quafie and want to sell the obx let me know my brother might possibly be interested.

interested in selling it.