NO TARIFFS ON US ORDERS

And Competitive rates to bring R Theory parts to every corner of the globe.

Parts Designed To Help You Win.

Performance parts for Miatas, S2000's, and other platforms!

Apply to become an R Theory dealer

Dealer Application

Do you have a retail company and interested in becoming an R Theory Dealer?

Our Products

Featured Product

Parts Designed To Help You Win

Read More

Most Popular Products

Unbeatable Customer Service

No hidden Fees

Fast Shipping Worldwide

New Products

Also Available At These Retailers

Latest News

Meet our Universal Sway Bar Adjuster - SBA

Meet our Universal Sway Bar Adjuster - SBA

Your car might be running OEM or aftermarket sway bars to control body roll, but is it performing at
Read More
Track Days Shouldn’t Be Spent in the Pits: How Our Coolant Reroute Kit Solves Miata Overheating Once and for All

Track Days Shouldn’t Be Spent in the Pits: How Our Coolant Reroute Kit Solves Miata Overheating Once and for All

You’re flying through your favorite section of the track. The car feels alive, your turbo’s in full
Read More
Sway Bar Tuning for NA and NB Miatas: Unlocking Your Car’s Full Potential

Sway Bar Tuning for NA and NB Miatas: Unlocking Your Car’s Full Potential

If you've upgraded your NA or NB MX-5 Miata with that set of coilovers you've been eying, the next s
Read More
The Best Turbo Coolant Line Solution for Miatas: R Theory Motorsports’ Low Profile Mixing Manifold

The Best Turbo Coolant Line Solution for Miatas: R Theory Motorsports’ Low Profile Mixing Manifold

If you’ve ever added a turbo to your Miata, or plan to, you already know that routing a clean, reli
Read More
Upgrade Your Miata's Engine Bay with R Theory’s Billet Throttle Cable Bracket for Skunk2 Intake Manifolds

Upgrade Your Miata's Engine Bay with R Theory’s Billet Throttle Cable Bracket for Skunk2 Intake Manifolds

At R Theory Motorsports, we’re thrilled to introduce our latest product: a Billet Throttle Cable Bra
Read More
Welcome to R Theory Cycleworks

Welcome to R Theory Cycleworks

At R Theory Motorsports, innovation has always been at the core of what we do. From our V1 Miata Rea
Read More
4 New and Exciting Products to Elevate Your Miata Experience

4 New and Exciting Products to Elevate Your Miata Experience

At R Theory Motorsports, we are constantly pushing the boundaries of innovation, blending form and f
Read More
NC MX-5 added to the fleet!

NC MX-5 added to the fleet!

This trip took place in June 2021. NC MX-5 Added to the Fleet! For years R Theory has been deve
Read More
5 Ways Mountain Biking Can Sharpen Your Driving Skills

5 Ways Mountain Biking Can Sharpen Your Driving Skills

2020 and 2021 have been weird years for everyone. Regardless of how crappy they were, it left a lot
Read More
Car Photography for Beginners

Car Photography for Beginners

If you’re reading this you’re probably a fan of cars, and you might even own a car that you proudl
Read More
!