A critical analysis of recent publications devoted to the NmF2 pre-storm enhancements is performed. There are no convincing arguments that the observed cases of NmF2 enhancements at middle and sub-auroral latitudes bear a relation to the following magnetic storms. In all cases considered the NmF2 pre-storm enhancements were due to previous geomagnetic storms. moderate auroral activity... https://www.roneverhart.com/BRExhaust-2004-2006-Nissan-TITAN-5-6L-Direct-Fit-Replacement-Exhaust-System/