This balancer appears to be for an sbc. Do any of you know the manufacture?
About all I can find is what looks like semi circles with pb in the middle.
I saw the "sfi" logo on it so I checked the fsi list of approved manufacturers. They list a company called Precision Parts/Powerbond that makes balancers. I'm gonna assume that the "PB" stands for powerbond and this is the company that makes this balancer. Here's the link to sfi's manufacturers list. You'll find the link to the Precision Parts/Powerbond company's website in the "balancer" section.