The NMCA Technical Committee released a rule adjustment today in Xtreme Street. Adjustments include a new cylinder head permitted for Chrysler small-block combinations in NMCA Xtreme Street. These amendments go into effect immediately, unless otherwise noted in this document. The 2020 NMCA Class Rules and all Rule Revisions/Clarifications can be found here: https://www.nmcadigital.com/2020-event-info/class-rules-payouts/