One of my top bolts on my o2 literally disappeared during my drive today and now I have a massive exhaust leak. Does anyone know the exact specs on the bolt size and pattern and stuff ? Need to buy a replacement bolt asap. Thanks

 

m1x1.25 is the threading I believe. The bolts should have the same thread as the bolts that connect the exhaust mani to the turbo.

Make sure to get the proper bolts. I bought some cheap non-exhaust grade and they bent after heating up.