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Valve Seal Protector Sleeves, 5/16" & 8mm Applications, Pack of Two

  • Image 1
  • Example of a sleeve & seal installed on LS1 valve.
Calculated at checkout

Product Description

1Valve Seal Protector Sleeves

Fits 5/16" & 8mm Stem Valves- includes LS1

Once upon a time, these were included with all valve seal sets. Back in the day when old school teflon seals were all the rage, protector sleeves were mandatory because teflon seals would certainly get damaged without a sleeve. The old school teflon seals slowly became obsolete as they were replaced with a better design- the fixed body metal clad viton seal. Within a few years, protector sleeves were no longer included in seal sets and the sleeve supply dried up.

It's always made perfect sense to use a sleeve over the valve stem groove as it guarantees the seal will not get cut from any sharp edges in the groove area.

We've been searching for them for years. In 2013, while at a trade show, we found a German manufacturer who could supply them. We've invested a lot of time and money to make protector sleeves once again, available.

If used with care, these normally last for multiple sets of heads. Every head builder should have a few of each size to assure seals are safely installed.

Also available in packages of 100 or more. Write for a quote.

This listing is for 5/16" & 8mm sleeves only but we also carry sleeves in the following sizes.

  • 5mm- in stock
  • 5.5mm- will be added but not available right now
  • 6mm- in stock
  • 6.5- will be added but not available right now
  • 7mm- in stock
  • 5/16" & 8mm- in stock
  • 11/32"- in stock
  • 3/8"- in stock


Sleeves are easy to use. Just slip the sleeve over the valve and slide the seal right over the groove. See pictures for an example of sleeves installed on a few valves.

Seals install more smoothly when lubricated.



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