Did anyone install the cats themselves?

 

they are not easy on the G37 Coupes, if you dont have a lift, dont bother, cheaper and easier to have it done by someone else.

 

Average cost to have installed here in texas is 130-142.50 from what ive seen as an example for you. I took it to a freind the first time and i think he broke my Sensors. so carefull. I still have to get it fixed lol

 

it is not expensive, but if you dont have 1/2 drive and long extensions, you will never break the bolts loose, especially the ones facing up.
besides, have a shop do them will put the responsibility on them to not break your sensors.

 

I had a Berk on my 350z no cel, I'm trying ERZ now.