What are the belt sizes for a Chevrolet Corvette C7?

The serpentine belt size for a C7 Corvette depends heavily on your specific trim (LT1 Stingray vs. LT4 Z06) and whether you are running the stock pulleys or an aftermarket overdrive setup.

Assuming you have a C7 Z06, the community has verified several exact Gates part numbers for the most common configurations.

Here are the confirmed belt sizes for the C7 Z06:

• Stock Pulleys: Gates K080855HD ⁸
• 9% Overdrive Lower Pulley (Innovators West): Gates K080865HD ⁸
• 18% Overdrive Lower Pulley (Innovators West): Gates K080885HD ⁸

If you are running a combined upper and lower pulley swap, owners have found success with these belts:

• 15% Lower & 2.3 Upper: Gates K080876 is the recommended fit ⁵.
• 18% Lower & 2.3 Upper: Gates FleetRunner K080878HD works, but note that it puts the belt tensioner about 3/4 of the way to the maxed-out side ³.

If you are running an aftermarket blower, the requirements change drastically. For example, a Magnuson 2300 with a 75mm pulley requires a 94-inch 6-rib double-sided belt, which typically has to be sourced from an auto parts store like NAPA by matching the length ⁴.

What exact C7 trim and pulley setup are you running? If you have a base Stingray or a different supercharger configuration, let me know so we can pin down the exact belt you need.