1990-05 Hard Dog Sport "Fat Boy" roll bar

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Part number
20-28020 2 DIAG
Fat tubing and hard top compatibility. Previously known as the "Hard Core Hard Top"

Note: this bar is also known as the (deep breath) Hard Dog M2 Hard Core Hard Top. We gave it a different name to clarify what's going on, as it's closer to a Sport than a Hard Core.

Looking for a bar that will allow the use of hardtop side latches, but with the stronger 1.75" diameter tubing used in the Hard Core as well as harness mounting points and double diagonals? Here you go. This is an excellent and popular street option. We have it on a number of our own cars.

This bar combines the geometry of the Sport with the thick Hard Core tubing. This means it is SCCA Solo I legal, but it can be difficult to get low enough to pass a helmet clearance test.

In order to work with glass windows, this bar uses harness tabs instead of a harness bar. However, some SCCA regs do not allow harnesses to share mounting points. For that situation, we have the bolt-in harness bar. We do offer a version of this bar with a welded-in harness bar that is not compatible with glass windows - please call us to order.

Shown here with the optional vinyl wrap.

Fits all NA and NB Miatas. Compatible with stock glass windows. If you have an aftermarket top with a glass window that is larger than stock, you'll need the no-diagonal version. Keep in the mind that the no-diagonal version is not SCCA Solo I legal. Please call to order this version.

Shipping note: These bars will be drop-shipped from the manufacturer. These bars are usually kept in stock. If not, depending on where the bars are in the production process, it could take approximately 2-6 weeks for delivery. If you would like one shipped outside the US, please contact Hard Dog Fabrication directly.

More Information
Part number 20-28020 2 DIAG
Fits model year: 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1999, 2000, 2001, 2002, 2003, 2004 (non-MSM), 2005 (non-MSM), MSM
Fits Exocet? No
California emissions No information at this time
Manufacturer Hard Dog
Proposition 65 Warning: Cancer and reproductive harm
Flyin' Miata exclusive No
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