[TJay74]

Originally Posted by DaveC113

IMO it's best to use the stock air filter and replace it more often, especially on a MAF equipped motor as the oil in K&N and similar filters can contaminate the MAF sensor and cause the engine to run lean.

Catch cans are debatable but for a huge majority of uses I believe it is not necessary and you're risking your warranty over something that provides no benefit.

A K&N filter will not cause any MAF issue if it is oiled normally, more so if it is right out of the box. It sure wont cause a P0430 which is a CAT code saying the CAT is not working correctly.

I have always used a catch can on all of my GM vehicles since 2001. I recently had my 2016 GMC Sierra with the 6.2 in for a bad injector. Tech had to pull my intake and said my valves and tops of the pistons were some of the cleanest he had seen, wanted to know how often I had the top end cleaner done. When I said never I have a catch can on the truck, he told me it was the best decision I made.

Point is the CC work, while it wasnt an issue on the prev generation engines it is on the DI engines where the valves dont get any raw fuel on them to clean them off.

If it wasnt for me having meth injection on my Camaro I would be trying to figure out a way to get a CC back on it due to my Procharger install.