eddie555 Posted October 25, 2015 Share Posted October 25, 2015 Hi guys, I was thinking of removing the second cat from my wrx bugeye, I've already put a stainless cat back on. Would I need a remap or will it be ok to run with just the one cat? Cheers Quote Link to comment Share on other sites More sharing options...
GeoffLeggy Posted October 25, 2015 Share Posted October 25, 2015 Is it already remapped? Quote Link to comment Share on other sites More sharing options...
eddie555 Posted October 25, 2015 Author Share Posted October 25, 2015 No, not been mapped. Quote Link to comment Share on other sites More sharing options...
GeoffLeggy Posted October 25, 2015 Share Posted October 25, 2015 Wouldnt worry at all, youll probably just notice a change in tone thats it. Will flow better but engine characteristics shouldnt be affected. Anyone suggest otherwise? Quote Link to comment Share on other sites More sharing options...
stants Posted October 25, 2015 Share Posted October 25, 2015 Should be fine depending on location of 02 sensors, just make sure you get a decat pipe with the boss in for the sensor Quote Link to comment Share on other sites More sharing options...
GeoffLeggy Posted October 25, 2015 Share Posted October 25, 2015 This should be your layout. Quote Link to comment Share on other sites More sharing options...
eddie555 Posted October 25, 2015 Author Share Posted October 25, 2015 Will there be any issues with mot? Or should it be ok with the one cat? Quote Link to comment Share on other sites More sharing options...
GeoffLeggy Posted October 25, 2015 Share Posted October 25, 2015 The first cat will be doing all the main work as hot off the T but honestly I don't no. Hopefully someone here has that set up and can advise. Of course if your replacing the whole section just bolt the old one in for the MOT retest if it fails :D Quote Link to comment Share on other sites More sharing options...
martyc Posted October 28, 2015 Share Posted October 28, 2015 I've got a 2nd decat to fit too, the o2 sensor is before the 2nd cat so shouldn't throw a CEL, and the downpipe cat should be efficient enough to pass an mot, more so than a 'sports' cat that are advertised as mot friendly Sent from my iphone using Tapatalk Quote Link to comment Share on other sites More sharing options...
stants Posted October 28, 2015 Share Posted October 28, 2015 Sports cats are about as mot friendly as going in there and slapping the tester across the face, saying that mine wasn't mapped last year and was chucking fuel through the system like it was going out of fashion. You may need to back out the 2nd sensor with an adaptor a but if you do get any error codes you'll be able to possibly remove them with the ssm2 software available on the webs Quote Link to comment Share on other sites More sharing options...
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