A year after unveiling a tricked-out TRD version of the Avalon, Toyota is back at it with an even more radical setup for its resident full-size four-door sedan. Its called the Toyota Avalon TRD Pro Concept, and its loaded to the brim with track-spec modifications that enhance every detail of the sedan. From aerodynamic modifications to powertrain enhancements, the Avalon TRD Pro Concept has them all. Its a fitting homage to TRDs 40th anniversary, though it would probably be even cooler if Toyota has plans to produce it in some capacity. For now, we can enjoy the Avalon TRD Pro Concept for what it is: a glimpse into what a full-blown, track-spec Toyota Avalon could look like if it was left in the hands of TRD. Maybe someday we can also find out what it feels like to drive.