Help identify aluminum heads

cookietruck said

I don’t think promaxx does a victor copy. Maybe the PO meant procomp.

I think those piston part numbers are for mahle pistons. Supposed to be nice with a good ring pack.

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I think your right. The po told me "pro tech" so I assumed promaxx but more likely they are procomp. . .I was hoping they are promaxx because it seems like promaxx has larger CC