I just checked Corvette Central and the p/n is 58226 for about $58.00. It contains everything you would need to install the drain plug into the case. Not a bad idea if you want to change your rear end lube without disasembling the whole rear. A suction device may not get all the particulants and grunge off the bottom. The flushing action of the drain seems like good option. May get one myself. I'm rebuilding the rear now so it may a good time as ever.