Umbrella vs positive valve stem seals

So, I found the valve guides in my slant six are a bit too tall for the cam lift I plan to run. Time to take the head to a machine shop and get a bit of machine work done. Now the question I have: If I'm having the valve guides machined anyway, does it make sense to change them to run positive valve stem seals instead of the stock umbrella type? Pros and cons?

xtnbk Product Page

The 340 springs I'm running have plenty of room to clear stock umbrella type seals, so interference with the valve spring is not a limiting factor.

Follow along with the video below to see how to install our site as a web app on your home screen.

If you want to learn more, please visit our website viton valve stem seal.

Note: This feature may not be available in some browsers.

Want more information on hydraulic dust seal? Feel free to contact us.