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Piston mystery


76Scott02
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I have a set of pistons i am using for my engine rebuild. The bore size stamped on the top is 89.22mm. My old pistons are 89. What year would these be from?

1st "B" oversize, nothing particular, common probably to all years. The top of the piston is the clue to what year/type they come from.

http://www.bmw2002faq.com/content/view/46/32/

http://www.bmw2002faq.com/component/option,com_forum/Itemid,50/page,viewtopic/t,313512/

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