I haven’t had the opportunity to install the oil pump but it looks like a genuine Stihl part. The shipping was a problem but not because of the shipper, it was the USPS’s fault, which I hate dearly. Because of the shipping problem, I ordered a part off of Amazon which is a Chinese knockoff and it’s not the best quality and I’m just hoping that it will last but it doesn’t look like it will. The cheap Amazon part is cheap for a reason. I wished I could have gotten this part sooner.