R Theory Motorsports designs and manufactures quality parts for the NA/NB Miata platform. Before releasing a prototype, careful measurement and consideration to material choices are made. Even more care and attention to detail is made before beginning production of any part we produce.

We are always working on new stuff, check out our "Future Projects" section to see what we might be releasing soon!

custom designs

We know that sometimes you might have an idea stuck in your head for your car, but you need help making that idea a reality. R Theory Motorsports is here to fill that gap. While we mostly support the Miata platform, we can help design almost anything for any car. Heck we'll design something for your Man Cave, Kitchen, Work space, etc. If you can imagine it, we can probably make it a reality. Shoot us an email at for any inquiries for a Custom Design and a quote. 

Once your part is designed to your liking, we can get it manufactured for a great price! We have contacts with the best manufacturers in the industry. 

Check out some of our previous custom designs that we made for customers.                 Previous Work 

Manufacturing Services that we can provide include:

-Machining (Milling and Turning)

-Laser Cutting and Laser Engraving

-Plasma and Water Jet Cutting

-Welding (MIG or TIG)

-Powder coating


And many more!