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hmmm thats odd, the VG30DETT can be bored to 89 over and have no problems. What is the biggest bore you can modify on the RB26? The reason I ask is because the motor is a 2.6L and I don't see why you can't bore more than a 86mm like you stated. That doesn't make much sense to me. What is the stock compression on the motor and also, why wouldn't someone be able to bore it out to a 3.0L if the block was treated and sleeved correctly?
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