China.... Here is the reply I received when I asked.

Josh,

Thanks for your interest in our products. Our products are designed and tested in southern California, but like every single manufacturer with the exception of Kyosho and Mugen, our manufacturing is in Taiwan. The main difference with us is innovative design and the ability to make changes quickly if issues arise. We also have exceptional support.

I hope this help,
-Zac
Tekno RC