To prepare the S2000s for 25 hours of racing, modifications focused primarily on enhanced safety and durability. A roll cage, fire extinguisher system, lightweight competition seat and 5-point racing harness protect the driver, while heavy-duty brake pads, brake lines and shock absorbers beefed up the chassis to handle a day's worth of nonstop competition.

Street-legal racing-compound BF Goodrich G-Force R1 tires round out the performance tweaks, ensuring that the S2000 CRs have plenty of traction around Thunderhill Park's three miles and 15 turns of winding asphalt. The stock interior is largely untouched, and with the exception of the substitutions outlined above, so are most components of the engine, transmission, exhaust, brakes and suspension.