The Holden Torana GTR-X was a concept vehicle developed by Holden during the Torana's production era, sitting outside the mainstream HB-through-UC generational sequence as a design and performance study rather than a production model. Its exact specifications and debut year are not well documented in mainstream records, so precise mechanical details are difficult to confirm with confidence. It represents Holden's exploration of where the Torana platform could go beyond its standard road car brief, demonstrating an interest in more aggressive styling and performance potential than the production lineup delivered.