Lol. People usually do b20b blocks with b16a or b18c heads if your going the b20/vtec route. It would be retarded to put b16 pistons(81mm bore) in a b20b block(84mm bore). Just build the block b20b... forged pistrons(84mm bore) and forged rods(Ls/B20b spec)...etc$$$. You may want to resleeve the b20b block if you plan on putting alot of power through it. What do you want out of the motor, boost or N/A? You really need to do ALOT of research.
www.honda-tech.com is your friend.![]()




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