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Spec Miata Moves to Penske Shocks

Spec Miata, one of the most popular road racing classes in American amateur motorsports, is about to see a big change for 2019

Featured makes: Mazda
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How to Prevent Brake Vibrations

Quite simply, brake vibrations are never a good thing.

How to Dyno Your Anti-Roll Bars at Home

Do you know how stiff your anti-roll bars really are?

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From the GRM Vault: How to Drive Faster With Slow Hands

Pro driver Randy Pobst has some tips to make you a faster driver.

Suspension Mythbusting: Solid Axle vs. IRS

We often see solid-axle cars keeping up with or even outrunning their IRS-equipped competitors.

Winter Sport

How to Turn a Worn-Out Miata Into a Snow Toy

Featured makes: Mazda
How to Go About Upgrading Your Brakes

“Jack of all trades, master of none” is a pretty good description of OE brake system designs.

Can You Upgrade Your Dampers by Replacing the Oil Inside?

We decided to put one of our favorite rumored speed secrets to the test.

How to Execute DIY Track Testing Like a Pro

You don’t have to be Consumer Reports—or even GRM—to conduct your own product tests.

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