Volvo RWD 200 Forum

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Piston size 200

What's the stock size of a b21 piston (in mm)? I've got a set that are 91.99mm and I'm not sure if its an oversize or what. Any insight?








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Piston size 200

those are stock. b21 are 92mm, b23 are 96. each piston is sized to it's bore. there's a letter stamped in the block next to the bore, a, ,b ,c and d. i forget exactly which letter is what size or the differences between the sizes. keep in mind, if you go to a store and order std. pistons, they will be 92mm, not 91.99, 91.98 or whatever, and they will fit the bores in the block, regardless of the letter size. and so it goes, chuck.







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