If your underdrive pully(s) are eating belts, the problem is not the belt. Gates belts are the best in the industry and supply Top Fuel with blower belts.
2011 E90 DCT White / Black, ZCP
2010 ML 350 White / Black P2 Lighting Package (Wifes)
2008 E90 6MT White / Silver (Lease End)
99 FRC Corvette 12.1 @ 115 (Sold)
87 Turbo-T 10.09 @ 137 (Sold)