NA/NB Miata Flat Underbody + Bracing Group Buy

NA/NB Miata Flat Underbody & Underbody Chassis Bracing Group Buy

We’ve improved our Miata Flat Underbody design and relaunching the group buy. We also designed a new Frame Cross Brace for the NA/NB Miata chassis. So we’re launching both products at the same time!

To keep this page clean and brief, we added more information on both products and group buys in separate pages. Info regarding pricing and group buy timeline will be on the page you’re on right now.


Additional Product Info_

  1. NA/NB Miata Flat Underbody Kit

  2. NA/NB Miata Frame Rail Cross Brace Kit

How To Sign Up

  1. Fill out the form below. You can choose more than 1 option incase you would like to participate in both the Flat Underbody and Chassis Bracing Group Buy.

  2. After receiving your form, we will send you an invoice for a $50usd deposit for each item you selected. Both PayPal and Credit Card is accepted.

  3. Once we receive your deposit, we will add you to the group buy list!

Group Buy Timeline

We will begin taking deposits to sign up for the group buy on Thursday, September 2nd, 2021. Sign up deposits close on Monday, September 20th, 2021. Once group buy numbers are finalized, manufacturing will begin. We will likely have finished products around 2-3 weeks after sign up deposits close. Once manufacturing is complete, we will send invoices for the balance payment. Your order will be shipped once the balance is paid.

Group Buy Pricing

R Theory Flat Underbody Pricing.jpg

Note: Diffusers are sold separately from the Flat Underbody Group Buy. If you are participating in the group buy and would like to bundle a diffuser with your Flat Underbody, contact us!

Cross Brace Pricing.jpg

The number of participants for each group buy will be counted separate from each other.

If you have any questions or concerns, contact us!

Group Buy Entry Form