Review on FEL-PRO SS 72632-1 Valve Stem Seal Set - Enhanced Performance and Quality Assurance by Sean Davis

I bought these and couldn't figure out where the outlet is and where the inlet is either. So I called the federal magnate and spoke to a tech. He informed me that the company decided to use high quality rubber for all 16 gaskets instead of high quality exhaust rubber and standard intake rubber. (Other companies do this to save money) So they're interchangeable. Quality also seems good and installs easily with an audible click while seated. ****Update 4/8/18*** I overhauled my engine and it has been running for 2 weeks now. Haven't had any problems with seals yet. I wouldn't hesitate to buy them for other builds. 2nd update: 05/25/19. It's been over a year now and the quality is great. Enjoy