WELCOME! I am a former GM owner and now 2017 PW owner myself. Let us know if we can help with that mod list. We offer just about everything and offer discounts to the members here.
Please check out our RAM owners preferred RAM owners parts section.
https://gotexhaust.com/c-1183874-ram-owners-preferred-products.html
This is just a taste of what we offer. I do recommend you check out the Solo muffler delete or MR400 muffler kit. Also the Pedal Commander! Let me know if you are looking for anything in particular and message me, then I can offer you our special forum member pricing!