a calmini exhaust header & hi flow system was put on this samurai , that i had bought a month ago. my questions are i can not find the main plug for the o2 sensor, may have been cut or pulled off? no plug there, i know what plug looks like, none to be found? so what color wire should i look for, and also is this a heated o2 sonsor ? i feel this would affect how well it would run!! thanx in advance for all help and advice!!