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Porschmer

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Everything posted by Porschmer

  1. I found some used cats on ebay, but seems pointless to buy OEM cats that will fail next time I go to the track (in 2 weeks). The other options suck too - buy new OEM's for $3,400 that will probably fail or buy aftermarkets that require switching sides for placement of the second O2 sensor. Maybe the solution is to buy a 991.
  2. Thanks very much for the advice. The scan indicated a bad cat bank (or something like that). I can't recall the code offhand, but my mechanic confirmed that it needs a replacement cat on the right side.
  3. I've read that tracked 996's often have the original cats die a rattling death. The honeycomb falls apart with the increased heat and stress. The smog check is a big consideration. The mfg's state that the products are 50 state emissions legal. They do not mention anything about passing a visual inspection.
  4. Apologies for making my first post a whiny, help me post. I need new cats and don't want to fork over $3,500 for OEM parts. There are a handful of aftermarket manufacturers making mid-pipes with 200 cell sport cats for ~$1,500. Nearly all of them move the after-cat O2 sensor about 10 inches further away from the original position. The lead wire to connect the after-cat O2 sensor does not stretch an extra 10 inches. I called two of the mfg's and asked how to solve this. They both said to switch the sides of the connections for the after-cat O2 sensor. This means the drivers side after-cat O2 sensor wire is connected to the passenger side mid-pipe and vice versa. I really hope that makes sense. The muffler shop said emphatically, don't switch sides, citing that it can cause bad readings and possibly harm the engine. The mfg's say their customers do it all the time with no issues. I'm lost. Your input is greatly appreciated.
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