my setup is a gsr with p30 pistons and ctr cams, stock header, stock cat and stock intake. My first test i got.... 15mph 25mph HC = 31, max 89 HC = 18, max 54 CO = 0.01, max .53 CO = 0.04 max .51 NO = 2889, max 708 NO = 705, max 746 Second test i have VAFC with 20 percent more fuel to lower the NO also i put another cat on with less miles. 15mph 25mph HC = 311, max 89 HC = 316, max 54 CO = 4.62, max .53 CO = 5.90 max .51 NO = 38, max 708 NO = 27, max 746 well i guess 20 percent was to much and maybe the cat wasnt better then my old one? im gonna try 10 percent and im gonna put my other cat back on. ive already failed twice how many chances do i get??? and im a gross poluter what does that mean and what are the bads about it??? i am planning on passing next but am i in any trouble cause im a gross poluter ?