Banks monster exhaust
I added: Hypertech chip, K&N air filter, headers with dual exhaust. The best improvement came from the headers.
Champion SPRE14MCC4. Those are the stock and work just great.
There are a couple of places where someone can purchase a Dodge Ram exhaust. The best place to check would be the website, Auto Anything because they have them at an affordable price.
cold air intake and exhaust system
Any name brand 5w20
A Dodge Ram 1500 is a entry-level pickup truck from the Ram line. Then even have a heavy duty line. The manufacturer's website would be the best location for more information.
Wagner Thermo Quite
The one it was built with. Champion RC12LC4
Any name brand 5w20
10W30
Sound quality is of course subjective, but I like the exhaust note of the Flow Master brand mufflers...not too loud, but definitely a performance sound.
Any major brand synthetic lube in the correct weight.