Originally Posted by Coolmen

B20's are 84mm and B18/b16's are 81mm. Once you resleeve a B18 or a B20 your going to start off with 81mm (all aftermarket sleeves start at that) so your once b20 just turned into a 1.8. (b18a/b's and b20b/z's share the same crank) Sleeving for 100 bucks? ya right... B20 sleeves are the hardest to bore out due to their 1 piece design Your looking atleast 3-400 in labor for boring/honing/decking and cleaning. As turbo90accord said, it's way easier to start off with a b18a/b just because they are more readily availble and they are easier to bore out. Hope you understood that ;)

Jeff