These will only work with H22A4 55mm main journal engines. They will not work with H22A1 engines.
One often overlooked part when building an engine is the bearings. Getting a quality set of bearings can directly determine the longevity of your engine. We prefer to use coated ACL Race Bearings in all of our cars, and suggest them to all of our customers as well.
Big Ends, MAIN BEARINGS