ACL main bearings are of one of the highest quality, we use them in all of our engines. We offer a large choice of sizes for A+ and Pre A+ (A-Series) engines.
How to differentiate an A+ main bearing from a Pre A+ (A-series) main bearing:
Pre A+ engines have there locating tag on the side of all 6 half shells.
A+ engine have the locating tag on the half of 3 shells and in the centre of the remaining 3 shells.
Some boxes may arrive with metric sizes, this is nothing to be worried about, please find below the conversion chart: