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COMP Cams 521-1 Valve Stem Oil Seal - Metal Body Viton .500" Guide 3/8" Stem

Part of: COMP Cams Valve Stem Seal

Other options in this family: COMP Cams 535-1 COMP Cams 534-1 COMP Cams 506-1 COMP Cams 522-1 COMP Cams 529-1

Manufacturer

Picture for manufacturer COMP Cams

Part Number

521-1
6 reviews
Sale Price

$7.95

In Stock (6)

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Usually delivered within 2 days

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Product Details

The COMP Cams 521-1 is a premium metal body valve stem oil seal designed for high-performance engine applications. This seal features a durable metal outer body with a Viton rubber sealing element that provides superior heat resistance and oil control compared to standard rubber seals.

Key Specifications:

  • Guide Size: .500" (1/2 inch) outer diameter
  • Valve Stem Diameter: 3/8" (.375")
  • Material: Metal body construction with Viton elastomer
  • Design: Positive valve stem seal for improved oil control

Features and Benefits:

  • Viton material withstands higher temperatures than standard nitrile rubber seals
  • Metal body provides dimensional stability and prevents distortion during installation
  • Reduces oil consumption by precisely controlling oil flow to valve stems
  • Ideal for performance engines, racing applications, and high-temperature environments
  • Ensures proper valve lubrication while minimizing oil passing into combustion chamber

This seal is engineered for engines with .500" valve guide outside diameter and 3/8" valve stem diameter. The metal body construction allows for precise fitment and long-term durability, making it an excellent choice for engine rebuilds and performance upgrades.

Products specifications

Valve Guide Outer Diameter

0.5

Seal Outer Diameter

0.545

Valve Stem Outer Diameter

3/8

Valve Seal Type

Metal Body Viton

AMAZON ASIN

B002EDX2VK

Prop 65

WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov

C.A.R.B. Exempt for Foreign Vehicles Manufactured Before 1967?

Yes, but must meet tailpipe emission standards for year of vehicle.

C.A.R.B. Exempt for On-Road Vehicles?

Yes

C.A.R.B. Exempt for Racing and Off-Road Only Vehicles?

Yes, but must be a race/competition only vehicle.

C.A.R.B. Exemption Reason

No impact on pollution output of vehicle.

C.A.R.B. Exempt for California Certified Vehicles Manufactured Before 1965?

Yes, but must meet tailpipe emission standards for year of vehicle.

C.A.R.B. Exempt for Federally Certified Vehicles Manufactured Before 1967?

Yes, but must meet tailpipe emission standards for year of vehicle.

Such a smooth shopping process. Prices are super competitive, thanks autoplicity! :)

Very fast shipping, the product should arrive today acording to UPS, and I order it 2 days ago. The customer service is also great.<br><br>Thanks again,

Great pricing and quick shipping. GREAT

So I have an old car. It's and 83, seven years older than me. I'm also a student so I don't have much money and need to make as many repairs myself to save money. I go out to the local pep boys and auto zone to to try to find a repair manual that is for my old model but it's not available. I check online and there are very few copies on line. Autoplicity had the right manual at the lowest price by a good margin. <br><br>TLDR; Autoplicity has EVERYTHING and at a cheaper price

Prompt order processing and shipping, the item I received came in good condition and I am eager to get it installed on my car. Over the phone customer support was prompt and polite, I would order from them again.

The magnaflow kit that I ordered was about $100 cheaper than any other site I could find. Shipping was fast, and relatively cheap too.

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