DRIVESHAFT SHOP Polyurethane Driveshaft Coupler, 12mm (2001-2010 Corvette & Z06)
[VTRB-12]

For those who think this is the same as the prothanes, they aren't. I had prothanes and the one of the couplers actually broke apart. It's polyurethane which the chances of that happening should be slim to zero, pointing closer to the zero. driveshaft shop assured me there's will not break apart.