O-Rings

O-rings are fundamental sealing components in virtually every automotive fluid system, from fuel and oil to coolant and air conditioning. This collection covers a wide selection of sizes and materials designed to match common automotive demands, whether you are rebuilding a fuel injector, resealing a thermostat housing, or restoring an air conditioning line. Choosing the right O-ring means matching the material to the fluid and temperature environment, and getting the exact cross-section and inner diameter for a leak-free fit.

  • Available in popular materials including Nitrile (Buna-N), Viton (FKM), and silicone, each suited to different temperature and chemical resistance needs
  • Standard and metric sizing to cover import and domestic applications
  • Used across engine, transmission, HVAC, and hydraulic systems
  • Look for durometer hardness and temperature range to match your application requirements

When selecting an O-ring from this collection, verify the required cross-section thickness (e.g., 1.5mm, 3mm) and inner diameter, and confirm the material is compatible with the fluid it will contact. For dynamic applications, consider a harder durometer; for static seals, a softer compound often works best. Always replace O-rings whenever a component is disassembled to ensure a reliable seal.

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$6.50 $8.79
-26%
Low in stock
Black FKM Viton replacement O-ring for Vibrant Performance fittings 11490 and 11490S
$4.99 $6.79
-27%
Low in stock
Five brown Viton O-rings for -8AN ORB port fittings
$4.70 $4.95
-5%
Low in stock
Fel-Pro ES70599 fuel injector O-ring kit showing a set of black rubber sealing rings for automotive fuel systems.

$3.56

Low in stock
Single black FKM rubber replacement O-ring for Vibrant Performance 3-inch weld fittings.
$9.29 $12.50
-26%
In stock
Vibrant Performance FKM rubber replacement O-ring for 5.00 inch HD weld fittings
$7.50 $10.29
-27%
In stock
Fuelab 14601 Diaphragm and O-Ring service kit for 515xx and 525xx series fuel pressure regulators.

$28.00

In stock
High-temperature replacement O-ring seal for S400 turbocharger compressor cover outlet flanges
$1.93 $1.99
-3%
Out of stock
MAHLE Original GS33711 fuel injector O-ring and gasket kit for Ford Powerstroke diesel engines.

$120.75

In stock
Vibrant Performance AN thread O-ring assortment box set featuring sizes -3, -4, -5, -6, -8, -10, -12, and -16.
$34.99 $46.99
-26%
In stock
Ten black -20AN rubber O-rings for sealing straight cut AN adapter fittings
$16.59 $22.59
-27%
Low in stock
Ten black rubber -12AN O-rings for sealing straight cut automotive AN adapter fittings.
$9.29 $12.50
-26%
In stock
Ten black -10AN rubber O-rings for sealing straight cut fuel and oil port fittings.
$8.29 $11.29
-27%
Low in stock
Ten black rubber -8AN O-rings for straight-cut AN fuel fittings.
$8.29 $11.29
-27%
In stock
Set of ten black rubber -6AN o-rings for automotive straight cut fuel and fluid fittings.
$8.29 $11.29
-27%
Low in stock
Set of 10 black rubber -4AN O-rings for Vibrant Performance straight-cut fuel and oil fittings.
$7.29 $9.99
-27%
Low in stock
PTFE replacement O-ring for Vibrant Performance part 14942R
$5.19 $6.99
-26%
Low in stock
Black FKM rubber replacement O-ring for Vibrant Performance 4.00in HD weld fittings.
$6.29 $8.59
-27%
In stock
Vibrant Performance 12577G replacement FKM rubber O-ring for 3.50-inch HD weld fittings.
$6.29 $8.59
-27%
In stock
Single black FKM rubber replacement O-ring for Vibrant Performance 3.00 inch HD weld fittings.
$6.29 $8.59
-27%
In stock
Vibrant Performance black FKM rubber replacement O-ring for 2.50-inch HD clamp weld fittings
$6.29 $8.59
-27%
In stock
Black FKM rubber replacement O-ring for Vibrant Performance 4-inch weld fittings
$11.29 $15.29
-26%
Low in stock
Black FKM rubber replacement O-ring for Vibrant Performance 3.5-inch weld fittings.
$11.29 $15.29
-26%
In stock
Black FKM rubber replacement O-ring for Vibrant Performance 2.5-inch weld-on fittings.
$8.29 $11.29
-27%
In stock
Black Vibrant Performance FKM Viton replacement O-ring for part number 11493
$8.99 $12.29
-27%
Out of stock
Vibrant Performance 11492R black Viton FKM replacement O-ring for part numbers 11492 and 11492S.
$7.50 $10.29
-27%
In stock
Vibrant Performance replacement FKM Viton rubber O-ring for part numbers 11491 and 11491S
$5.99 $7.99
-25%
In stock
Radium Engineering 20-0088 O-ring service kit for multi-pump fuel surge tanks featuring various replacement seals.
$9.45 $9.95
-5%
Low in stock
Radium Engineering replacement O-ring seal kit for fuel surge tank maintenance
$23.70 $24.95
-5%
In stock
Radium Engineering O-ring service kit for 8oz catch cans featuring replacement black rubber seals.
$9.45 $9.95
-5%
Low in stock

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