Have been looking some Connecting Rod & Main bearings for my B18 C motor and noticed that I have come across these alot. Are they any good. They claim that they are better than OEM Honda bearings as they are made out of a higher grade material etc, etc ,etc.

 

It's not the quality of aftermarket bearings that you need to worry about. The issue is the sizes available. Look at this thread from yesterday.

https://www.honda-acura.net/forums/s...d.php?t=261263

OEM Bearings are best 9 times out of 10. It's very hard to meet Honda's percise oil clearances with anything else.