Alright, got my cats along with a bag of about a million nuts and bolts and some Y bracket looking things and no instructions.

Anyone able to help on the installation of these things?

Also, how do you reach that top left bolt on the left cat if you are laying under your car with feet towards engine. Damn that's an angle.

 

You reach the top nuts from the front of the car with 3' worth of extensions. Good luck getting 'em back on by yourself since the bolts are not welded like the stockers.

 

I got all the bolts for the cats from under the car. if you got your cats from performance nissan, then there are some y-shaped "washers", that are a little larger than a quarter. these go on the back y-brace where the y-pipe and rear eghaust pipe bolt together. without them your car will rattle. Mine did.