red_zebra Posted August 21, 2013 Share Posted August 21, 2013 Hi people My car has an apexi avrc and is boosting at 1 bar. However, it has both cats in and from reading the BPU thread this is going to cause lots of heat and bad things will happen to my engine If I just replace the 1st cat for a decat pipe will that get rid of the excess heat? I'm a little nervous about changing both in case I get pulled and they do a roadside emission test. If I do just take the first cat out will I still need a restrictor ring or will the 2nd cat provide enough resistance. Thanks Carl Quote Link to comment Share on other sites More sharing options...
tony tt Posted August 21, 2013 Share Posted August 21, 2013 The second cat should provide enough resistance but it will still generate a lot of heat. To be honest I don't know of anyone or read about anyone being pulled for an emissions test. Double de-cat and RR ring and just keep the 2nd cat for the mot if needed. Quote Link to comment Share on other sites More sharing options...
red_zebra Posted August 21, 2013 Author Share Posted August 21, 2013 Fair enough then that's all the encouragement I need, I'll grow some balls and fit both Cheers tony Quote Link to comment Share on other sites More sharing options...
Jord Posted August 21, 2013 Share Posted August 21, 2013 You can be tested for emissions at the roadside? I've never heard of that happening. Quote Link to comment Share on other sites More sharing options...
Abz Posted August 21, 2013 Share Posted August 21, 2013 You can be tested for emissions at the roadside? I've never heard of that happening. It won't be a patrol car that has emissions kit in it but it could be done, never seen it done myself. Some Supra's pass emission even with both cats taken out. Quote Link to comment Share on other sites More sharing options...
marc_p Posted August 21, 2013 Share Posted August 21, 2013 What year is your supra? Quote Link to comment Share on other sites More sharing options...
red_zebra Posted August 21, 2013 Author Share Posted August 21, 2013 It's a 95 auto Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted August 21, 2013 Share Posted August 21, 2013 You can be tested for emissions at the roadside? I've never heard of that happening. Happened to me on my way to get my decat fitted LOL! Quote Link to comment Share on other sites More sharing options...
Guest Roger NE Posted August 21, 2013 Share Posted August 21, 2013 Some Supra's pass emission even with both cats taken out. Yes, and although it's a legal requirement for Manufacturers to fit Cats, there is NO legal requirement to have one ! So you can remove them when you drive the car away from the dealer - as long as you can pass the Emissions Requirement for that age of vehicle without them. Quote Link to comment Share on other sites More sharing options...
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