Pyrrolizidine alkaloids (PAs) are a widespread group of secondary metabolites in plants. PAs are notorious for their acute hepatotoxicity. genotoxicity and neurological damage to humans and animals. In recent decades. https://www.roneverhart.com/MagnaFlow-2001-2004-Kia-Spectra-California-Grade-CARB-Compliant-Direct-Fit-Catalytic-Converter/