What is the main benefit of using PTFE valve seals?

PTFE valve seals, like these from COMP Cams, offer excellent sealing properties to prevent oil from entering the combustion chamber. They are also designed to handle more clearance, making them suitable for performance applications with dual valve springs.

How do I know if these seals will fit my engine?

These seals are specifically designed for engines that use 5/16-inch valve stems and valve guides with an outer diameter of 0.530 inches. You'll need to verify these measurements on your engine's valve train components.

Are these seals compatible with all types of valve springs?

These COMP Cams PTFE seals are designed with a positive stop feature that allows for more clearance, making them a good choice for dual valve springs. They offer improved sealing compared to basic umbrella or O-ring seals.

COMP Cams Valve Seal 5/16in PTFE 500-1

Name: COMP Cams Valve Seal 5/16in PTFE
Brand: COMP Cams
Price: 8.95 USD
Availability: InStock

COMP Cams Valve Seal 5/16in PTFE

$8.95

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

COMP Cams Valve Seal 5/16in PTFE. Keeps oil out of the combustion chamber for better engine performance.

Key Features

Fits 5/16 inch valve stems and 0.530 inch valve guides.
Made from PTFE material for effective sealing.
Positive stop design allows for increased clearance for dual valve springs.
Features a .630 inch outer diameter.
Helps prevent oil from entering the combustion chamber.
Designed for applications requiring better sealing than O-ring or umbrella seals.

⚠️ CA WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or birth defects or other reproductive harm. Learn more

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Will this fit your vehicle?

Product Details

This is a COMP Cams PTFE valve seal, part number 500-1. Its main job is to prevent oil from getting into your engine's combustion chambers through the valve guides. This helps keep your exhaust cleaner and your engine running smoothly. It's designed to fit applications with 5/16-inch valve stems and valve guides that are 0.530 inches in outer diameter.

What sets these seals apart is their PTFE material and a positive stop design. This construction allows for more clearance, which is particularly useful if you're running double valve springs. Unlike basic umbrella or O-ring seals, these offer a more robust seal against oil intrusion, especially in performance applications. The .630-inch outer diameter ensures a snug fit in the valve guide.

This particular seal fits a range of classic Mopar engines from the late 60s and early 70s, including models like the Dodge Challenger, Charger, and Plymouth Barracuda. If you're rebuilding or refreshing an engine from that era with the specified valve stem and guide sizes, these seals are a solid option to ensure proper sealing.