The exhaust I mentioned was a custom one, done by my local Zoro Muffler. The exhaust for the LFX engine (2012+ Camaro V6) is as such:
The exhaust manifolds are integrated/built into the cylinder heads of the engine so we can't replace them (i.e. we can't do "headers"); instead, the catalytic converter assemblies (which each contain
two catalytic converters) bolt directly to the engine. The engine has a true dual exhaust system so there is one cat assembly on either side which then ties into an H-pipe; up to this point the pipes are 2.5" OD, then after the H-pipe the pipes reduce to 2.25" OD, and then we have resonators, mufflers and then tips.
What I did was remove the factory H-pipe and replace with a "resonated" X-pipe (muffler in the form of an X-pipe), and then removed the rest of the piping downward and replaced with 2.5" pipe, removing the resonators and mufflers.
The high-flow cats I mentioned would replace the factory cat assemblies with an assembly that has a single, "high-flow" cat (less restrictive) along with a built-in resonator (resonators help deepen the tone by cancelling out the faster-moving, higher pitch gases; you need a certain amount of resonation/muffling or else you'll get a high pitch "raspy" noise which typically sounds terrible, and when replacing restrictive catalytic converters - two in this case - with high-flow ones there is that much less muffling, so the built-in resonators help to keep a nice sound while providing more gas flow and, therefore, potentially more power). You can also get high-flow cats without the resonator, but you may experience some "rasp" at higher RPMs depending on the rest of your exhaust.
There are other various exhaust systems out there including axle-backs (replace everything from the axle back, so basically the mufflers), cat-backs (replace everything after the cats including mufflers - basically what I had done), high-flow cats, and finally headers. I chose to go custom as I figured it would be the most free-flowing as well as being cheaper. The cost of the resonated X-pipe was $160 total (I live in Canada so everything costs way more up here
), and then I paid about $675 for the custom piping.
Regarding the smoked light covers, it's all personal preference - if you like them then go for it - I just chose not too... yet. Google some pictures and see what you think.