The carmaker says the pair bring “vintage cues into modern design”, which stretches the idea of a lightweight sports car to the “extreme”.
Called the MX-5 Spyder and MX-5 Speedster, the concepts will be vastly different, says Mazda, with the Spyder representing a vintage roadster mixed with modern-day design features.
The Spyder features vintage-look leather throughout, and is finished in a new Mercury Silver paint.
The Speedster, like the Spyder, focuses on shedding weight wherever possible, but the Speedster has been on an even stricter diet.
Mazda however is yet to reveal where the weight has been sacrificed or how many kilograms have been shaved from the MX-5’s usual figure in either concept.
What Mazda does tell us is that the Speedster previews a range of genuine and aftermarket parts and accessories for the MX-5 customer, and is finished in another new paint colour - this time Blue Ether.
The 2015 SEMA Show will take place in Las Vegas from November 3 to 6.
Last year, Mazda used the SEMA show to unveil its then-new MX-5 Global Cup Racer.