From their website:

NOVAK BUILT AND SUPPORTED
Novak takes pride in its manufacturing facility in Irvine, California and also with its use of high-quality components and assembly and testing processes. Each Novak Vulcan Brushless Motor is built and tested in the Novak factory to Novak’s exacting standards. Each motor stator is hand-wound for maximum copper fill, and each motor is individually tested for consistency. The motors are also tuned to the same factory timing, run under a simulated load, and visually inspected, packaged and weighed to ensure the best product is sent to customers. All Novak products are supported by Novak’s knowledgeable customer support staff and race team.

NOVAK BUILT AND SUPPORTED
Novak takes pride in its manufacturing facility in Irvine, California and also with its use of high-quality components and assembly and testing processes. Each Novak Impact Racing Brushless ESC with X-Drive is built and tested in the Novak factory to Novak’s exacting standards. All Novak products are supported by Novak’s knowledgeable customer support staff and race team



I recall they had to remove the "made in the USA" sticker because such a high percentage of the electronic components are sourced from over seas. But they build the ESCs in CA.