Welcome to the #1 Car Parts Store!
Welcome to the #1 Car Parts Store!
Performance parts for Miatas, S2000's, and other platforms!
Check out our new arrivals!Do you have a retail company and interested in becoming an R Theory Dealer?
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About us
Find out about our company, our products and services, and contact information.
Store
Want to purchase our products? Or just want to see what we offer? Visit our online store!
Dealer Application
Do you have a retail company and interested in becoming an R Theory Dealer?
Worldwide Shipping
We ship anywhere in the world! Visit this link for an International Shipping Quote.
4 Reasons to Choose Us
Built by Car Enthusiasts
We care about your project car! If it’s not something we wouldn’t put on our own car, we won’t sell it.
International Shipping
No matter where in the world you are, we have shipping options to your door.
Wide Range of Products
R Theory offers almost any part that you would need for your build. Check out our line up of R Theory Designed parts as well!
Customer Support
We are here to help before and after your purchase. With decades of combined experience, we will help to ensure everything goes smoothly.