Mazda will showcase two MX-5 Miata concept cars at the 2015 SEMA Show to demonstrate lightweight performance. The MX-5 Spyder Concept captures the character of a vintage roadster in a modern design with bespoke leather interior details. The MX-5 Speedster Concept is a study of minimalist 1950s roadsters, removing elements like the windshield to reduce weight. Both concepts are significantly lighter than the production MX-5 and feature aftermarket parts from companies like Racing Beat and KW Suspensions. The concepts will be on display at Mazda's booth at the SEMA Show from November 3-6.