This is the standard belt included with VMP Gen3R kits for 11-17 Mustang and F150 5.0 L. This size fits VMP no-grind FEAD system with 88 mm / 3.4 in or 92 mm / 3.5 in pulley. This belt fits Roush style grinding required FEAD 11-14 with the taller intake manifold and 79-85 mm pulleys. 88 mm and 92 mm require a K060825 belt. Most 2.3 L and 2.65 L belt fitments are interchangeable, however keep in mind the 2.65 L blowers such as the Gen3 and Gen3R sit slightly higher and the belt is less likely to fit if you are running one of the largest pulleys such as the 92 mm / 3.5 in. K060815