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  1. What size cats?

    ///M3 Forum
    I'm trying to get some aftermarket cats as the ones I have are bad. I have some catless headers on the way so all I need to Euro-spec the car is some cats that will pass a sniffer test. Only thing is, I can't seem to find any place that tells me what size cats I need. From what I've read, 200...
  2. Bad Cats?/Euro Exhaust Options

    ///M3 Forum
    I've looked around and can't seem to find any conclusive info on this particular situation. If you know of a thread that may help please feel free to steer me in that direction. Alright. So, for the last couple months I've been getting SES codes saying my cats are below thresh-hold. First it...
  3. "Service Engine Soon" P0420 & P0430. Looking for advice.

    General E46 Forum
    Hi everyone! I'm looking for some advice on fixing up my 2001 BMW 325xi. I just bought this car off craigslist for a very fair price. I've been going through the hoops of getting registered in the state of NY and the last step was to get it inspected. I was on my way to my local Pep Boys and...
  4. WTB 325i catalytic converters - NY

    Engine & Performance
    Hello! Looking to buy catalytic converters for a 2001 325i. I am in Dutchess County, NY, but willing to drive a bit to buy. Let me know. Thanks!
  5. Massive loss of power - mechanic says catalytic converters clogged

    General E46 Forum
    Hey all, Been having an issue for a month plus now. 2001 325i with 176k. I was getting lean codes and misfires and oil leaks. Valve cover gasket changed fixed the oil leak. A couple of spark plugs had oil on them and it was burning pretty bad for a while so I changed them all. Found a rip in...
  6. E46 328i - Headers/ SAP delete/ 02 sensor

    General E46 Forum
    Hey Guys, I have 2000 328i 4dr and am about to purchase aftermarket cat-less headers (live in AZ). Couple questions surrounding the whole idea: 1) What should I do with the SAP system after headers installed? Bypass it by having someone re-program or buy a simulator kit? (from where?) 2)...
  7. Cat failure due to CCV breather failure

    E46 Xi Forum
    Hello, looking for some general input here. 2002 330xi had small leak (CCV breather) and was smokng a bit. Dealer replaced failing system and all was well. 2 weeks later was driving down the road and engine lost all power, blinking check engine and a look in the rear view showed that I was...
  8. wtb 330ci cats

    Engine & Performance
    looking for catalytic converters for my 2002 330ci, i need both bank 1 and 2.