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O2 Sensor Performance Chip?


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way before i decided to get the S/C setup i bought an 02 sensor chip for the IS from eBay for about £35,and i never fitted it.does anyone know about these or have an opinion on em.Is there actually a power increase or is it a myth?.im thinking of fitting it until my s/c kit gets fitted on the 20th just to see what the crack is.Would anyone advise for/against.or should i stay well clear and be patient?

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