Effective today, March 23, 2020 - All turbocharger compressor covers will require inspection and approval by NMRA/NMCA Tech before they can be used in NMRA/NMCA competition. This includes turbocharger compressor covers that have already been used in competition. Classes that this affects are: NMCA XTREME PRO MOD NMRA/NMCA STREET OUTLAW NMRA RENEGADE / NMCA XTREME STREET NMRA LIMITED ...