I switched to 2600 kv F40 Pro v2 Motors and got a lot of power back while still maintaining the awesome response of these props. If you have these props try them with a high kv setup.
Here are some specs for the HQ Ethix S3 Prop:
Propeller Diameter: 5 inch
Pitch : 3.1
Blades : 3
Material : Poly Carbonate
Weight :3.6g