I'm exactly the opposite.
"Reman" parts start out as quality OEM items, with the wear-parts replaced. Therefore, the basic parts--the core--is OEM quality, proven to work like it's supposed to.
"New" parts are nearly-always Communist Chinese garbage from front-to-back, side-to-side. Quality is totally dependent upon the ability of neo-slave labor to Receive and Duplicate (R&D) and then manufacture an existing design to the requirements of people in the USA (Communist Collaborators) to meet unrealistic cost goals. Keep in mind that there are factories in China that put nets on the roof so their employees can't jump off and commit suicide on company property. That's not a corporate culture I want to support.
A good core is pointless and worthless if it’s loaded with cheap junk seals and bearings. All you got is a good core. I never said to buy a new cheap Chinese part. There are manufactures that have new parts that aren’t cheap Chinese parts. I order my stuff from online dealers selling quality factory parts or well known manufacturers. I just replaced my pump on my Ford a few years back. I found it on ford dealer for 230 bucks. A cheap Chinese one was about 120 and a reman about 90. The original pump went 180,000 miles. A factory pump should last another 180,000. And I guarantee you Edelbrock makes a water pump made for that engine that’s new made in USA. I did my wife’s Infiniti a few weeks ago. I ordered a factory Infiniti pump. $240. The factory original one lasted 195,000 miles.
There are also GM dealers who sell online and they only sell
quality factory parts. That or new top tier brand would be fine. Those were the new parts I’m talking about.
Buying a reman even though it’s a factory core rebuilt doesn’t mean anything. I had and seen too many issues with reman stuff breaking or being faulty out of the box so I simply dot buy them regardless of who rebuilt it.
Did a rack and pinion on a buddy’s Lexus. You could tell the rebuild was just crap ass junk. To me it loooked like a painted junkyard part that was cleaned up.
Put it in. Was popping while on the rack. Took it off. He ordered a new one online for $100 more than the “reman” one. Put it in. Worked great no issues. This is why I simply don’t buy anything reman anymore. .