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Dorman 02255 Vacuum Bypass Caps - 1/2 In. I.D, 2 Pack Universal Fit

Free shipping on orders over $29.99

$6.99

$ 2 .99 $2.99

In Stock

About this item

  • Engineered from durable, heat- resistant vinyl
  • Provides a tight fit to prevent vacuum leaks
  • Excellent for capping lines and hoses while testing carburetors, emission control systems, vacuum lines, and more
  • Conveniently packaged in a variety of sizes, assortments, and quantities
  • Support available - every Dorman part is backed by Dorman's ASE Blue Seal Certified technical support team


Dorman offers a comprehensive line of Vacuum Caps for almost any automotive repair job. All our Vacuum Caps are constructed of high-quality materials for long-lasting durability.


wtrks2e
2025-09-04 16:55:22
I needed this larger cap for the vacuum port on my new LS3 engine. It fits perfectly.
Jacki
2025-09-02 12:18:44
I crammed a 3/8" cap on a 1/2" outlet and it split causing a massive vacuum leak. Don't do that. Buy the right one. These are good quality. Buy these.
Matt Pitkin
2025-08-16 20:07:12
Perfect fit
Stephen Holden
2025-07-16 15:43:54
Anything Dorman is good.
Emoy
2025-07-07 11:56:33
Used to cap vacuum port on LS6 intake manifold for power brake booster. Fits well and tight.
John R
2025-05-23 14:04:12
Used these to cap off unused tranny cooler in my Radiator .
Cha
2025-04-08 14:20:59
It's ok but over priced I could have just use a hose and seal of the end and it would be the same thing.
Jake Hoffman
2025-03-21 10:03:52
I expected these to fit on the back of my Holley carb. It was loose fitting and fell off, one was actually smaller in diameter (not by much) than the other. I'm fairly certain the port requires a 1/2 cap, but I'm not sure hence the 4 out of 5. Came quick semi happy.
TucoSalamanca
2025-02-04 13:15:02
Use as intended, make sure you measure the diameter of what you are blocking off.