A few weeks back I got my ARK exhaust installed with no problems. Due to some personal reasons I had it removed and my stock exhaust reinstalled by a different shop over this past weekend. I've been driving it fine for the past few days but today I noticed the CEL on with codes P0420 and P0430. I hit up the shop to see what was up and he told me he didn't touch anything that should have caused this. What should i do

 

probably an exhaust leak. he didn't put something back properly when putting back the stock exhaust

 

Have you tried looking in the drivers manual for the code? Usually they list everything that goes wrong with the car if a code comes on. But like shivad said, probably an exhaust leak.

Also just wondering what you didn't like about the ark exhaust? I just got mine installed last weekend and I'm loving it.

 

Those codes are for catalytic converters.