Hi all. I am new here. Just bought a 07 Suburban c 1500 LTZ and have come across something that makes me go Hmmmm. I have a three Rivers Aluminum Driveshaft that looks much newer than what it is hooked up to. Were/are these standard (I doubt it) and if not, why would someone need to change to this (especially at only 18k miles)

Second question: When I purchased the vehicle there was verbage to the effect "No ARB on Frame." Only ARB reference I can find is for 4x4 air lockers. This is a 2wd luxury car that was lowered (professionally) for better handling. Any thoughts would be appreciated. Thanks.