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Discussion Starter #1
Does anyone have any techn info on the block wall thickness/piston bore sizes of an rb25 or previous experience of reboring the said. I know a few hardcore enhthus have rebored th rb26 but i've never heard the same of 2.5ltr. Also are there oversized piston kits avail. Cheers Gee
 

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Well i had mine bored 1mm over size from 86mm to 87mm, don't know if that is any good to you.
 
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