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1 PTFE Valve Seal for .530" Guide Size, 5/16" Valve Stem; COMP's Positive Stop PTFE valve seals offer more clearance for dual springs with better sealing than o-ring or umbrella seals. This 500 seal has a .630" outer diameter and fits applications with 5/16" valves and .530" OD valve guides.

Set of 12 PTFE Valve Seals for .530" Guide Size, 5/16" Valve Stem; COMP's Positive Stop PTFE valve seals offer more clearance for dual springs with better sealing than o-ring or umbrella seals. These 500 seals have a .630" outer diameter and fit applications with 5/16" valves and .530" OD valve guides.

Spring Seat and Seal Kit for 5.3/6.0L LS; Designed to work with our LS6+ Beehive Valve Springs, this spring seat and seal kit includes 8 seats/seals for the intake valves and 8 seats/seals for the exhaust valves.

Set of 16 PTFE Valve Seals for .530" Guide Size, 5/16" Valve Stem; COMP's Positive Stop PTFE valve seals offer more clearance for dual springs with better sealing than o-ring or umbrella seals. These 500 seals have a .630" outer diameter and fit applications with 5/16" valves and .530" OD valve guides.

1 O-Ring Valve Seal for Stock Guide Size, 11/32" Valve Stem; (1) O-Ring Valve Seals: for 11/32" Valves and OE-Size Guides

Set of 12 O-Ring Valve Seals for Stock Guide Size, 11/32" Valve Stem; 11/32 O-ring

Set of 16 O-Ring Valve Seals for Stock Guide Size, 11/32" Valve Stem; Fits: 11/32" Valve Stems / OE-Size Valve Guides (.400" Outer Diameter)

Set of 8 O-Ring Valve Seals for Stock Guide Size, 11/32" Valve Stem; 11/32 O-ring-1

1 Umbrella Valve Seal for Stock Guide Size, 11/32" Valve Stem; Typically requiring no machine work, our 502 umbrella seal is a great option for stock guide applications with 11/32" valves needing a seal replacement.

Set of 12 Umbrella Valve Seals for Stock Guide Size, 11/32" Valve Stem; Typically requiring no machine work, our 502 umbrella seals are a great option for stock guide applications with 11/32" valves needing a seal replacement.

1 PTFE Valve Seal for .530" Guide Size, 11/32" Valve Stem; COMP's Positive Stop PTFE valve seals offer more clearance for dual springs with better sealing than o-ring or umbrella seals. This 503 seal has a .630" outer diameter and fits applications with 11/32" valves and .530" OD valve guides.

Set of 12 PTFE Valve Seals for .530" Guide Size, 11/32" Valve Stem; COMP's Positive Stop PTFE valve seals offer more clearance for dual springs with better sealing than o-ring or umbrella seals. These 503 seals have a .630" outer diameter and fit applications with 11/32" valves and .530" OD valve guides.