Fel-Pro 13-14 Subaru WRX/13-20 WRX STI/00-12 Outback Engine Valve Stem Oil Seal Set

If you're rebuilding the top end of your engine, especially on a Subaru like a WRX, WRX STI, Outback, or Forester, you'll want to make sure you have the right valve stem seals. This set from Fel-Pro is designed to keep oil from leaking past your valve guides and into the combustion chamber, which can cause blue smoke, fouled spark plugs, and reduced performance. Fel-Pro puts a lot of thought into making parts that work well in the real world of repairs, meaning they account for imperfect sealing surfaces you might find.

What's neat about this particular set is that Fel-Pro engineers them specifically for the application. That means you get the right type of seal – whether it's an umbrella style, O-ring, or positive seal – made from materials suited for the job. They even include a special installation tool to help protect the seal's inner lip as you put it on, which is a common point of failure if not done carefully. This attention to detail helps ensure a lasting seal and a smoother running engine.