Forged Pistons for turbo conversion

i take it these are for a cg13. would the block need machining or are they a direct fit, all cg pistons can be different sizes, what size are these exactly. any pics?
 
These are for the CG13 and the block would need machining/honing but that's a good thing as the new rings will be able to seal correctly.
 
These are for the CG13 and the block would need machining/honing but that's a good thing as the new rings will be able to seal correctly.

what exactly do these come with? rings and pins? what do they lower compression to?
 
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