Pistons to a maximum oversize of 0.060in are available for the 1600 and 1800 engines, but the recommendation is to bore any block to the smallest oversize that can be used. Except in extreme cases, there is little point in boring a block to the maximum size within the standard range. Boring a block oversize does not result in any significant increase in the power that can be developed by the engine: real power comes from modifying the engine correctly and using the right camshafts, carburation, porting, compression ratio, and so on. For the 2000cc engine, pistons of 2.25mm/0.084in oversize are available. These pistons give a capacity of 2094cc and this is the largest capacity you should ever consider because, at this size, the bores are still just within acceptable limits (bore wall thickness) and all of the commercially available cylinder head gaskets will still fit without trouble.