Bethania Garage Inc. & Hard Dog Fabrication Hard Dog Fabrication Logo
The M3 Sport


Here at Hard Dog we offer an extensive line of Roll Bars for the 2006 - 2015 3rd Generation MX-5. Built from heavy wall tubing these bars are a serious upgrades from the stock NC equipment.
The factory cross brace is reused making it easier to remount OEM accessories and no alterations to the stock seat belts are required.
The M3 Sport utilizes the factory hoop mounting points with additional lower plates bolted through the bulkhead using grade 8 bolts and reinforcement plates. Additional rearward support is provided by 2 rear braces w/ large 3/16" mounting and back-up reinforcement plates anchored with grade 8 bolts and self locking nuts.
Because of the additional height and rearward braces, the M3 Sport is not compatible with the retractable hard top.
The standard main hoop is as tall as the soft top will allow. A slightly shorter version is available for the removable hard top.

Two main hoop diagonal braces and / or harness bar and / or removable forward bracing may be added.


  • Not sure which Roll Bar is right for you? Contact Us!

  • Protect your bean. Custom formed high density padding is now available for Hard Dog Roll Bars!

M3 Sport Features:

  • Meets NASA HPDE and SCCA Solo and Time Trials requirements when equipped with diagonal braces

  • Allows full seat travel and tilt

  • Full interior height - 3-1/4" Taller than the factory metal hoops

  • Complete use of soft top

  • Removable hard top version available - 3/4" shorter

  • Durable black powdercoat finish

  • Constructed of highest quality 1.75" diam x .120" wall  drawn over mandrel tubing

  • 2 rearward braces w/ 3/16" mounting and backup plates

  • Complete hardware kit w/ grade 8 bolts and self locking nuts

Roll Bar Accessories:

M3 Sport - 2006 - 2015 Year Models
- Contiguous 48 U.S. States Shipping $225.00
Item/Number Description
M3S Black Powdercoat
M3S2D Black Powdercoat w/ Double Diagonal
H Harness Bar
K Speaker Bracket for Harness Bar
P Black Powdercoat Removable Forward Brace - Double Diagonal Only
T Removable Hard Top Version
No additional charge
Stitched Covers w/ our Custom Formed High Density Padding (Cover Shipping $30.00 Contiguous U.S)
Item/Number Description
V Black Vinyl
L Black Leather
Hard Dog Custom Formed High Density Padding (Pad Shipping $30.00 Contiguous U.S)
Item/Number Description
CPAD Formed Pad Only

M3 prototype - no diagonal
Click to Enlarge Image

No Diagonals

M3 Sport
Click to Enlarge Image


M3S prototype install
Click to Enlarge Image

M3 Sport w/ Double Diagonals & Harness Bar
(Note rearward braces)

M3 Sport w/ Double Diagonals
Click to Enlarge Image

WARNING: This article is sold without warranty, expressed or implied. No warranty is made to this product's ability to protect the user from any injury or death. The user assumes that risk.

Updated Jan 1, 2024