Can anyone help me wanna know if b16a2 bottom end main bearing are the same as b20. An if anyone got jun stage 3 settings thanks

 

All b-series use the same bearing diameters to a close extent. Only thing is these bearings are color coded for different thickness's, so to order a set of bearings for a b16 will probably not be the set of bearings that will clearance out properly in your b20. The underside of the block has a 5 letter code stamped on it for the 5 main bearings, simply match these letters up to the number stamped on the crank. The honda service manual has the corresponding chart to tell you what color bearings to use.