Hello everybody !!

So after failing sniff test for my catless cayenne , the co was 50% and it was permited only 30% and every year it will be half to meet euro 6 standart , I am concerend about my catless panamera.

I dont want to put stock back , because I like my performance now , is there any other way ? Putting oem back is f difficult , shop charged me 250$ because they remove front axle ( front differential ) for clereance .
An option is to install supersprint hjs cats which are placed in the resonator , so I can keep aftermarket downpipe but still I do not understand how can they work ? And also does 200cell hjs pass strick emmision test ? I dont want to risk spending another 3k and find out that it cant pass .

Thanks

 

What year? I thought newer cars they just plug in? no more sniffer test? Well for california.

http://www.smogtips.com/new-smog-law-ab-2289.cfm

 

I am located in balkan , before july nobody cared but now suddenly they introduced new emmision low when they put a tube in exhaust and measure 3 gas . I failed in the co because I am running catless . Didnt try pana. yet because my check is in november but I am very very worried .

 

I have a CTT in Costa Rica. What I do is put the second set of cats with the stock exhaust back to pass the test. This is how I get past it.