allenham24

I ran into a strange set of Gm forged titanium connecting rods.6.24 center of crank to center of pin.the pin is.944 and the crank is 2.22 p\n12571253BA . I could not find any application for them. im not sure what engin they belong in. a buddy said they look like part of gms C5R racing program. dose anyone know what these are? May be a stupid question but i would like any info you guys can offer.
thanks in advance for any info