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  1. New pistons and rings sub 20k

    Can you even hone these plasma coated cylinder walls? Didn't think you could.
  2. Should I go catless or catted downpipe (with stock turbo)?

    I don't know, that's directly from MHD. (Dangerous for the engine that is)
  3. Should I go catless or catted downpipe (with stock turbo)?

    The code I'm getting isn't a cat efficiency code, which is further evidenced by the fact I still have the code on a test pipe tune. According to MHD, using a spacer is dangerous and shouldn't be done. Apparently they use the downstream O2 sensor in their tuning strategy
  4. Should I go catless or catted downpipe (with stock turbo)?

    Never had it on the stock. Got it almost immediately when I put the downpipe on even after getting a new O2 sensor.
  5. Should I go catless or catted downpipe (with stock turbo)?

    I have a super annoying CEL after installing the ds-1. 12BB01 - oxygen sensor after catalytic converter, from lean to rich: delayed response. I've tried aftermarket and stock downpipe tuned, and I changed the O2 sensor. Code persists. Any clue what could be causing this?





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