hey guys new to the forum but owned my 03 step side since new love it. but last week the cel came on. auto zone read the cel an said it was o2 sensor left bank 1. an then they cleared the code. it came back on in bot 2 days. i was looking for a o2 sensor an went back up to auto zone an had it re read to make sure i get the rite o2 sensor i needed. Now it is sayin the code p0420 the cat code.
since i have to do the sensors are the cats. i was goin to do the full exhaust for more hp an tq an the sound lol. i found headers for 285.00 on ebay the obx headers. an i was wanting to know do i have to have the cats on it still i know i got to use the o2 sensors tho. an i was goin to use a flowmaster 40 detal muffler.
what do u all think bot the exhaust i want to use an the question bot the cats if i have to use them r not? an i dont want the light to say on ether.
an the truck is a v6 sr5 trd 5 speed with 67,000 miles on it an a 2003 an xtcab. 4x4 step side bed
thanks for any help guys an sorry for a short story here lol. just need help an dont want to leave anything out. an sorry bot the spelling too.