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  1. Problems and Service
    this has been the year of codes for me. evap and 02 sensores and now cat issues. on 2 cars. i have a 06 2.2 auto cobalt 125k on it. and this code came up p0420 and i ran a ton of tests using the HF scanner. the cat runs at 700 rpm 900 deg at 4k 1200 deg. i did an ir temp and in front of cat...
  2. Engine Mods
    Hey guys. I'm planning on getting a ZZP midlength header and catted downpipe. I was originally looking at a 200 cell cat on PJ's suggestion, but I also noticed that he mentioned that it would throw codes from time to time. I'd rather have a cat that is slightly more restrictive if it means...
  3. Engine Mods
    i was wondering were i could get a custom downpipe for my 06 cobalt ls, i just want one that is catless but ont have alot of money to spend