The Elite S1 was groundbreaking as the first production car to feature a full fiberglass monocoque chassis, making it incredibly lightweight and rigid for its time. This was a radical departure from traditional steel frames. By SG2012 - https://www.flickr.com/photos/57664366@N08/9000322838/, CC BY 2.0, https://commons.wikimedia.org/w/index.php?curid=57317516