I used PlastiDip on my 2016 Silverado for the wheels and Bowtie emblems. After 3 1/2 years the wheels needed a little touch up here and there, but the emblems still looked great when I traded it in last fall.
I had the S-type on my 2016 5.3 and fully intend on doing the same with the 2021. Check out the Borla video that does the comparison of stock vs touring vs S-type. Do not listen on your phone, use something with a good sound system. The system in your truck will be fine and turn it up.
I did this on my 2016 and was very happy with the outcome. I applied 3 coats of color and 1 clear coat for a semi-gloss look. It's been 4 years since doing them and I will say I used a pressure washer and many trips through the car wash during the winter months. By year 3 I had to do a few spot repairs and now I will need to redo them completely in the spring. I will most likely add at least one more coat of color this time to hopefully increase durability.
I am very happy with the E2-X on my 2016. I made use of all the factory quick connectors to the manifold. I did need to search for an adapter to get the CSS to connect to the intake tube (CAI specific). I find this mounting point easy to get a bottle or cup under the drain valve and I never get more than a few ounces maybe 6 at the most out of it.