Tech Bulletin: USRA B-Mods
On January 9, officials from the United States Racing Association made an amendment to the 2020 USRA B-Mod rules.
In Rule 13.8.10, World Products Part #043600 and #042670 were added to the list of permitted aftermarket GM steel stock replacement heads.
Download the 2020 USRA B-Mods rules from the USRA website at USRARacing.com.