All FAQs

Is there a spec tire, or is tire choice open?

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Is there a spec tire, or is tire choice open?

Each Club Spec class has a spec tire model and size for Solo® and Time Trials competition. You can run any tire you like for Track Night in America®, Track Days, Road Rally, HillClimb, Race Experience and RallyCross (though tire choice may effect what class you end up in for RallyCross).  For safety, Club Spec cars are also allowed to run 300tw (or higher) tires of any model as a wet tire for Time Trials events.  Many use those tires also as their street tires.

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Will Club Spec rules change every year and make my car obsolete?

That’s exactly what the program is designed to avoid. Club Spec rules are meant to stay stable over time rather than shifting annually, so a car built to the rules today should stay competitive for years, not seasons.

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Where do I start if I want to build one?

Pick your chassis, review the specific rules page for that car (CSM, CSX, or CSC), and reach out to [email protected] with questions. The Club Spec Facebook group is also an active place to see real builds and ask questions of current owners.

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How much does it cost to build a Club Spec car?

Costs vary by chassis condition and how much of the performance package you need to add, but the program was built around keeping used-car prices and modification costs low and predictable. In general, Mustangs and MX5s can be bought and built for $25k and under, while the Cayman, offering more performance and luxury, starts around $50k for car and kit. Owners can certainly spend more for a newer, nicer, lower mileage example, but Club Spec offers a bit of a departure from classes where the fastest, often most expensive builds keep pushing costs up for everyone.

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Is Club Spec a national championship class?

Yes. Starting in 2026, Club Spec Mustang and Club Spec MX5 will crown Champions at Solo and Time Attack Nationals. You can also compete for a championship at RallyCross Nationals or go for a win at the United States Road Rally Challenge in your Club Spec car.

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What programs can I run a Club Spec car in?

Without adding safety equipment, Club Spec cars are eligible for Solo (autocross), RoadRally, Time Trials and Track Days/Track Night in America- though we do recommend rollbars, seats and a racing harness for events on track. With some simple parts swapping, Club Spec cars can easily fit into an existing class for RallyCross. If you do add basic safety, you can add HillClimb and with a full cage Club Spec cars are perfect for Race Experience events.

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Can I daily-drive a Club Spec car?

Yes, and that’s by design. Club Spec rules were written so a competitive build doesn’t require an overly stiff suspension or a roll structure that makes the car miserable to live with day to day.

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Do I need to buy a performance package?

All cars have a required performance kit (wheels, tires and suspension) that is required to run in its class. They also each have optional modifications, intended to make the cars more durable for motorsports and easier to maintain. For those who want to race or HillClimb their Club Spec car, or just want more safety for Track Days and Time Trials, there are also safety allowances for each car. Each is a little different, and all are specific (hence, spec) so make sure to check the CSC, CSX, and CSM rule pages for all current requirements.

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Why these three cars?

Each is widely available on the used market, mechanically simple to maintain, and built on a chassis with enough aftermarket support to build a stable, affordable performance package — without opening the door to the kind of expensive arms race that drives up costs in other classes. Each is a well known, proven and fun platform, beloved by enthusiast.

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Which cars are eligible?

Three right now: the 2006–2015 Mazda MX-5 Miata (NC chassis, class letters CSX), the 2005–2009 Ford Mustang GT (S197 chassis, class letters CSM), and the 2017–2025 Porsche Cayman/Boxster base model (718 chassis, class letters CSC).

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What is Club Spec?

Club Spec is SCCA’s answer to “buy one car, do all the things.” It’s a tightly controlled ruleset built around a small number of specific, affordable chassis, so one properly built car can compete across Solo, Time Trials, RoadRally, Hillclimb and Road Racing. With some adjustments here and there Club Spec cars can even RallyCross —giving owners access to everything SCCA offers.

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