Eligibility: The 2006 - 2008 Mazda MX-5 is eligible for competition at 2600 lbs (w/driver).

Note: Ballast is permitted to be used to achieve the minimum weight for a vehicle. Ballast may be mounted anywhere in/on the car provided that it does not perform a non-approved function. All ballast shall be mounted in such a way that tools are required to remove it. Holes may be drilled in the chassis and the chassis may be reinforced in order to safely secure ballast provided that the reinforcement does not perform a non-approved function.


Engine Modifications: A Mazdaspeed cold air intake system is required.  A turn at the end of the exhaust pipe may be used in order to meet decibel limits.  Drivers are also allowed to substitute ignition wires and spark plugs, in addition to batteries - provided that the replacement battery is of similar amp-hour capacity, size and weight.  Any clutch disc and pressure plate of stock diameter and weight may be used, provided that they are bolted directly to an unmodified stock flywheel. 

Chassis Modifications: The 3-piece front strut tower brace (p/ns: NE57-56-48X, NE57-56-48ZA, and NE57-56-49X) that comes with the sport package shall be used.

Transmission/Final Drive Modifications: The stock OE 6-speed gearbox and ratios shall be used by all cars. The gearbox is a serviceable part.

Suspension/Steering Modifications: The MAZDASPEED Motorsports Development MX-5 Cup kit must be used in its entirety.  Double adjustable, threaded shocks are included, as are anti-roll bars and end links.  The end links may be disconnected when rain tires are being utilized, but under all other conditions must be correctly connected to the anti-roll bars and control arms as designed.  Suspension alignments (camber, caster, and toe) are unrestricted within the limits of the unmodified factory adjustments.  There is no minimum ride height.

Brake System Modifications: Brakes must maintain stock brake rotor specifications.  Backing plates and dirt shields may be ventilated or removed.  Lines may be replaced with steel lines, or Teflon-lined metal braided hose. 

Wheels: All wheels shall be one of the three OE Mazda Miata 17”x7” wheels (p/n: 9965-38-7070,  p/n: 9965-36-7070) or (p/n: 9965-45-7070).  All wheels cost and weigh the same.

Tires: The series spec tire is the BFGoodrich g-Force R1 (size: 225/45/17).

Body Modifications: Convertible tops and all attaching hardware shall be completely removed. Hardtops are not permitted.   

Safety Modifications: All MX-5 Cup cars will run with full saftey equipment, including an eight-point rollcage that must be welded into the car.  Other safety equipment includes a racing seat, full-face helmet, head/neck restraint, multi-layer suit, fire resistant shoes, gloves and underwear, as well as an electrical shut-off switch and an incorporated fire-extinguishing system.