for those of you with an 02 simm
 

My cat is falling apart. So, I've talked to the fastman and when he gets some more 02 simms in he's supposed to send me one. I was wondering how well they work and how hard they are to put in. If I had a welder and cutting torch here I wouldn't worry about how hard they are to put in, but since the muffler shop is going to do it I was wondering. Thanks.