LS6 intake manifolds were also used on all 2001+ LS1/6 engines. The casting number, located on the top rear edge of the block, is 12561168.
The [[SSC Ultimate Aero TT]] also utilized the LS6 block, albeit with an enlarged [[displacement (engine) displacement|displacement]] of {{cvt|6.3|L|cuin|1}} and the addition of [[twin-turbo|two]] [[turbocharger]]s.<ref>{{cite magazine|magazine=[[Autocar (magazine)|Autocar]]|url=https://www.autocar.co.uk/car-review/ssc/ultimate-aero/first-drives/ssc-ultimate-aero-tt|access-date=May 26, 2023|author=Staff|date=July 23, 2007|title=SSC Ultimate Aero TT|archive-date=May 25, 2023|archive-url=https://web.archive.org/web/20230525121513/https://www.autocar.co.uk/car-review/ssc/ultimate-aero/first-drives/ssc-ultimate-aero-tt|url-status=live}}</ref>
