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LS Series Viton Valve Seals, Hat Style, Gen III, VSS-602 & VSS-603

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VSS-602 & VSS-603
Calculated at checkout

Product Description

Includes 8 each, intake and exhaust seals

Blue Viton Valve Seals, GM/Chevrolet LS/LQ, engines

2002 up, Late Model "Hat Style" Valve Seals.

LS, LQ, LR, LM Gen III Vortec (not for SBC iron vortec heads)

Our "Hat" style spring base seals are direct replacements for most 2002 up Gen III engines.


      Hat style seals serve two purposes:

  • As a spring base for beehive and other std diameter springs 

  • As a Premium Viton Valve Seal

Our Hat seals for GM/Chevy LS/LQ series engines are manufactured to precise tolerances.

This type of valve seal not only seals oil from going down the stem into the guide but also seals oil from going up around the underside of the seal or guide OD when vacuum is high.

These seals fit tight over std LS/LQ guides, (.499"-.500" diameter guides)

Purchase comes with eight intake seals and eight exhaust seals, both labeled for easy indentification.


  • For- .313", 8mm Diameter Stems
  • Fits- .499"-.502" Guide Diameter
  • Height- .887"
  • Diameter @ base- 1.190"
  • Seal Body Diameter- .645"
  • Base Step Diameter- .785"
  • Base Step Height- .365"
  • High Temp Rating- 450 Degrees
  • 2002 up 4.8, 5.3, 5.7 & 6.0 Late model engines w/ hat style seals
  • Valve seal protector sleeve included? YES- Two 8mm sleeves are now included.


Not for engines with dual springs.

We also carry the std LS1 seals for engines running dual springs.

Looking for a different size seal? If we don't have it, we can get it. Just send us a message.

Alex's Parts- The smart choice in valve train parts~