All b series motors can take 81mm pistons. That is the stock bore. If you have ls pistons in there now, this would be a great upgrade. Expecially if your gunna go ls/vtec!Originally Posted by mengus200sx
All b series motors can take 81mm pistons. That is the stock bore. If you have ls pistons in there now, this would be a great upgrade. Expecially if your gunna go ls/vtec!
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