Thank you Jack for timely response. So I gather you agree that the oem pricey bolts are not superior/necessary? Although I went into the shop this eve. and took a very good look, with magnification, to inspect the areas where the stock serated flange bolts made contact with the mounting ring portion of the differential carrier. The bolts definitely scribed marks which did catch my finger nail into the surface, fairly uniformly with all 10 bolts. Would inside or outside tooth star washers be better than split loc washers?