Any tips or tricks? I am debating between doing it myself vs taking it to a shop.

 

I have a tip for installing the cats... for the top bolts from the header... go from the engine bay... your going to need a really long extension... which I didn't have at the time I was installing my test pipes... So i just gathered all the extersions I had in the tool box... and it worked. That I the only problem I came upon bewhen I started... I couldn't get the rachet to fit going from under the car... Everything else was easy... Oh and bolts are tight... Use silicone and let it soak for a little while and they should come right off... that was it... Took me about a little for two hours... from when I started... Only because I as trying to figure out how to get to the tops bolts and I also took a tv break...