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?

WE SHIP WORLD WIDE!

We offer competitive rates to bring R Theory parts to every corner of the globe.

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

Universal License Plate Bracket: What to Look for Before You Buy

Universal License Plate Bracket: What to Look for Before You Buy

If you’re looking for a new license plate mount, the right universal license plate bracket can make
Read More
Why Mazda Miata Mods Are the Ultimate Adult LEGO Project

Why Mazda Miata Mods Are the Ultimate Adult LEGO Project

The Adult LEGO: Modding a Miata Remember the pure joy of dumping a box of LEGO bricks onto the floor
Read More
Things Only People Who Have Squeezed Into a Miata Convertible Will Understand

Things Only People Who Have Squeezed Into a Miata Convertible Will Understand

The Mazda Miata Convertible Life Let's be honest: owning the Mazda MX-5 is an experience unlike any
Read More
Why Universal Car Parts Are Popular With Car Owners

Why Universal Car Parts Are Popular With Car Owners

Many car owners are looking for simple ways to upgrade the look, feel or drive of their vehicle. Som
Read More
How To Choose The Right Honda S2000 Performance Parts

How To Choose The Right Honda S2000 Performance Parts

When it comes to buying performance parts for the Honda S2000, you want to make sure you're purchasi
Read More
How to Avoid Fake Subaru Parts and Accessories Online

How to Avoid Fake Subaru Parts and Accessories Online

Buying car parts online is easy these days. You can find almost anything with a few clicks. That is
Read More
What Your Mazda MX-5 Build Says About You

What Your Mazda MX-5 Build Says About You

Your Mazda MX-5 Build Identity Every choice you make in the garage reflects your personality. From s
Read More
How to Choose Coilovers for Miata Without Making Mistakes

How to Choose Coilovers for Miata Without Making Mistakes

If you don’t know much about car parts, choosing a new suspension for your Miata can be confusing. C
Read More
Which Mazda Miata Accessories Are Right for Your Build?

Which Mazda Miata Accessories Are Right for Your Build?

Choosing the right components depends entirely on whether you prioritize track performance, daily co
Read More
Custom Miata Shift Knobs: A DIY Guide

Custom Miata Shift Knobs: A DIY Guide

Why Customize Miata Shift Knobs? Changing your Miata shift knob is the fastest way to make your car
Read More
!