Bethania Garage Inc. & Hard Dog Fabrication Hard Dog Fabrication Logo
The M2 Hard Core Hardtop


The Hard Core Series of bars were originally designed to meet the requirements for participation in the now defunct SCCA Solo 1 class. Some venues continue to utilize these specifications. Check the rules for the particular event in which you plan to participate as the event organizers have the final word on safety requirements. 

This series of bars are legal for, and actually exceed the requirements, for the current SCCA Time Trials, SCCA Solo and NASA HPDE events.

Stock seats and belts are compatible for the competitor that wants to maintain a dual purpose car for street and track events.

The M2 Hard Core models fit all Miata chassis from 1990 - 2005. Specifically designed for the second generation Mazda glass rear window convertible tops or equivalent size aftermarket glass window soft top installed on a first generation Miata. The M2 Hard Core are also compatible with all flexible plastic rear window convertible tops. See our Application Guide for factory glass window soft top specs.

Single or Double diagonal versions available.  
Glass window compatible harness tabs for "V" configured bolt-in harness shoulder straps are standard on the M2 Hard Core.
A Bolt-In Harness Bar is needed for situations requiring individual mounting of wrap-around harness shoulder straps.

The M2 Hard Core Hardtop is compatible with Mazda hard tops with stock latches and second generation  factory glass window soft tops or like size aftermarket glass rear window convertible tops.

Preferable for taller drivers using stock seats because of the more rearward placement of the main hoop. See the Schematic Views on our Application Guide for main hoop placement comparisons




  • 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!

Features include:

  • Full interior width; farther to the rear than the standard Hard Core allowing better head clearance for tall drivers.

  • Complete use of Mazda hard top with stock latches and second generation size glass window convertible top

  • Durable black powdercoat finish

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

  • Laser cut 3/16" mounting and back-up plates

  • Complete hardware kit w/ grade 8 bolts

  • Compatible with stock seat belts.

Roll Bar Accessories:

M2 Hard Core Hardtop - Mazda Hard Tops - OEM NB Glass Window Soft Tops - Contiguous 48 U.S. States Shipping $175.00
Item/Number Description
NB1 Single Diagonal
NB2 Double Diagonal
Stitched Covers w/ our NEW Custom Formed High Density Padding  - Cover Shipping $25.00 Contiguous U.S.
Item/Number Description
V Black Vinyl w/ custom formed padding
L Black Leather w/ custom formed padding
Custom Formed High Density Padding - Pad Shipping $25.00 Contiguous U.S.
Item/Number Description
CPAD Formed Pad Only

M2 Hard Core Hardtop Single Diagonal
Click to Enlarge Image

Harness Tabs w/ Eyebolts
Eyebolts installed in Harness Tabs for "V" configured shoulder strap mounting.
Click to Enlarge Image

M2 Hard Core Hardtop Double Diagonal
Click to Enlarge Image

M2 Hard Core Hardtop Side View
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 Aug 15, 2021