Alex G Posted August 14, 2019 Share Posted August 14, 2019 hey, i am researching some stuff related to getting late model Supras. is the j-spec cats a 3-way regulated catalytic converters? are they the same on US, EU or UK specs? are they same for all years (1993 to 2002)? according to the manual for a 1997 US-spec, both cats is 3-way in US-specs. i am assuming they are 3-way, but assuming is different from knowing Link to comment Share on other sites More sharing options...
Scooter Posted August 14, 2019 Share Posted August 14, 2019 I'm not sure what 3 way means but I do know the later jspec larger second cats are not the same as the earlier jspec ones. The early ones have a proper 'honeycomb' section visible the later ones have a straighter through bore pipe. I've not seen any differences in first cats ( small ones nearest the turbos) Link to comment Share on other sites More sharing options...
Alex G Posted August 14, 2019 Author Share Posted August 14, 2019 Three-way just means it does 3 tasks. removing CO, HC and NOx. more to read here if interested: https://www.open.edu/openlearn/ocw/mod/oucontent/view.php?printable=1&id=2492 Link to comment Share on other sites More sharing options...
Gingerholo Posted October 5, 2019 Share Posted October 5, 2019 the US catylytic converters are different from the JDM ones, theres only one in the downpipe, and theres one in the mid-pipe as well. If you know of a stock OEM downpipe with cat for sale lemme know! Link to comment Share on other sites More sharing options...
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