Nascar is strengthening it's penalties for the next gen car. Any team getting parts from unapproved sources could face losing a chance to race for the Championship. https://nascar.nbcsports.com/2022/01/24/nascar-toughens-penalty-structure-could-nullify-playoff-eligibility/
Final preseason testing is today 11am eastern at Phoenix. You can watch for free at Nascar's YouTube channel.