standard uppipe
30 July 2009, 12:04 PM
#1
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standard uppipe
i am changing parts prior to a remap is it possible to run with just the cat in the ported uppipe and do away with the one in the downpipe for the mot 
30 July 2009, 12:09 PM
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Worst choice as it is the only one likely to damage your turbo if the thing fails.
Leave the down-pipe one on, or fit a sports cat if you MUST pass an MOT.
HTH
dunx
P.S. Reading your other thread, the V7 STI doesn't have a cat in the up-pipe.
Leave the down-pipe one on, or fit a sports cat if you MUST pass an MOT.
HTH
dunx
P.S. Reading your other thread, the V7 STI doesn't have a cat in the up-pipe.
Last edited by dunx; 30 July 2009 at 12:10 PM.
30 July 2009, 12:34 PM
#4
3 OEM cats for a New Age: in up-pipe; in front downpipe section; and in rear downpipe section (between front downpipe section and centre resonated section):-
As you can see by what dunx has said, the one in the up-pipe is directly before the turbo's exhaust gas inlet -- so if the cat starts to break up...!!!
As you can see by what dunx has said, the one in the up-pipe is directly before the turbo's exhaust gas inlet -- so if the cat starts to break up...!!!
Last edited by joz8968; 30 July 2009 at 01:14 PM.
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