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Does anyone know if the R18 M/T bolt up to the R20 block? Also is it possible to use the K20 pistons in the R20 since its the same liter or should I stick to the OEM long rod pistons?
 

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I've been wondering about this for some time now, it depends on the stroke really. And rod length if anything I would swap the pistons, raising the compression ratio
 
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