I typically try to install OEM parts but maybe I need to rethink one of the parts places I'm using because when I ordered replacement chain guides they were blood red, not white or vanilla. The ones I removed from the engine were a faded brown.

In the instant case, if the chain, chain guides and tensioner were replaced, and you have confidence in the workmanship, then I suppose the only remaining question is whether or not there's even a hint of noise of timing chain slap when the engine is cranked and running.