AndrewOW Posted May 4, 2012 Share Posted May 4, 2012 I've just had my car MOT'd, and it's all fine, but I've decided to leave the 2nd CAT in place after the test while I do some research into sports CATs. Do I need the restrictor ring in place, or should that be removed? Quote Link to comment Share on other sites More sharing options...
Colin-mkiv Posted May 4, 2012 Share Posted May 4, 2012 I think the ring gives the restriction of 2 cats, so leaving it in would effectively give the restriction of 3 cats with a cat fitted as well? I dunno....I dont even have a turbo! haha Quote Link to comment Share on other sites More sharing options...
Caesard Posted May 4, 2012 Share Posted May 4, 2012 I think the ring gives the restriction of 2 cats, so leaving it in would effectively give the restriction of 3 cats with a cat fitted as well? I dunno....I dont even have a turbo! haha Duh !!!!! Get off the thread. Quote Link to comment Share on other sites More sharing options...
mr lover Posted May 4, 2012 Share Posted May 4, 2012 remove rr mate Quote Link to comment Share on other sites More sharing options...
Robzki Posted May 4, 2012 Share Posted May 4, 2012 Keep it in, turn off BC if you have one and test the boost? better to have too much restriction than not enough. You could always file it out until you hit 1 bar if that is your target. Quote Link to comment Share on other sites More sharing options...
AndrewOW Posted May 4, 2012 Author Share Posted May 4, 2012 I've just got my car back, and if your car did have a CAT, then it must have one installed. No more friendly MOTs! They also said they couldn't find the RR, even though the chap working on my car knows what they are and has an Evo with a full Apexi racing exhaust fitted. So CAT back on, and research into Hi-Flow CATs abound. Quote Link to comment Share on other sites More sharing options...
AndrewOW Posted May 4, 2012 Author Share Posted May 4, 2012 Oh, and another thing, my car passed with all the HIDs fitted too. I've got driving and full main beam HIDs, and all hunky dory. Quote Link to comment Share on other sites More sharing options...
AndrewOW Posted May 5, 2012 Author Share Posted May 5, 2012 I've run the car with the CAT in, and except for the lack of a kick from the 2nd turbo, it's very pleasant indeed. Boosting just under a bar. The exhaust is quieter now too and I like it Quote Link to comment Share on other sites More sharing options...
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