c5a this has been extensively discussed and you can find many of the posts by using our search function. I don't think we need to reopen this entire discussion so I will try and neutrally summarize and simplify it here. Bottom line is that you will find strong opinions on both sides of this argument. There are really two pieces to this discussion : Part of the issue is the very different fuel delivery method of our direct fuel injection engines vs regular fuel injection. Regular fuel injection washes the valves with fuel while in direct fuel injection that does not occur since the fuel is introduced after the valves. This of course applies to both the base and Z51 engines. The second part of the issue appears to apply more to Z51s than to base Stingrays. The Z51 has a dry sump oil system (that is designed to resolve potential oil starvation caused by centrifugal forces in a high speed curve as experienced on a race track with normal wet sump oil systems where the oil shifts away from the uptake point). It appears that there was initially confusion as to how much oil to add in a Z51 and how to measure the correct amount resulting in a number being overfilled with oil. This in turn caused the engine to 'burp' the excessive oil under certain circumstances and it ended up getting sucked into the tube bringing air to the air filter, and into the air filter, etc. The catch can option offered by several after market vendors was designed to in essence 'catch' this excess oil and prevent it from getting sucked back into the engine and ending up on the valves.How critical is it to install a catch can on a non Z51 C7 especially if you never plan on tracking it?
I would agree with abshapiro. You may want to consider installing the catch can yourself. I recent purchased and installed the Elite E2 "best" catch can (3 hoses) in my vette this past weekend. Even though it took me about 1 hour, I wanted to be sure about the assembly, the connections and the overall finish. I'm a little OCD like that. I thoroughly read the instructions and even located videos online to help answer any questions that I had. The third hose that goes into the OEM flexible connection attached to the mass air flow was easy. Just drill a 3/8" hole in the side and push in the hose barb.You may want to consider doing the install yourself. It takes maybe 15 minutes going slowly. I installed the Elite catch can. The 2 hoses on the car have quick disconnects. Push a button and they come off. One bolt attaches the can to the car frame. Then install 2 new hoses with hose clamps. I agree that the catch cans with 3 hoses is a bit more involved requiring drilling and having a professional mechanic do this might be better.