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Any shop with a PSTII or Piwis can flash it with a "ROW" tune.
It turns off the secondary 02's and does away with the secondary air pump.
Topless is correct, just HANG THE secodary 02's under the car in clean air. They are looking at CAT efficiency. Plug them back in and leave them in the trunk somewhere.. seriously.. plug them back in and let them *see* clean air.
They are heated, so secure them so they don't touch carpet. Up against plastic is fine.
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