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Your cart is empty.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.
Scott
September 3, 2025
I bought these to cap all the openings on a SBC engine( carb fittings, water pump heater hose outlet, manifold vacuum port, etc). I am storing a fresh built 383 stroker I built for next spring and wanted to keep all openings from getting debris or critters.They seem to be made from a decent material.
RDP
August 19, 2025
Works great!
Vince
July 30, 2025
Used two of these to close off the visibility spout on my yamaha Waverunner, fit perfectly. Thick rubber on the walls of these caps.
gilberto rangel
July 11, 2025
good
Xrocketman
June 29, 2025
Good quality
Lisa M Maes
June 15, 2025
The bypass caps work great on my Chevy Suburban. I am so grateful that I found these. I repaired the faulty bypass cap on my vehicle and voila, no more leak. I am very happy! Thank you!
Gage
June 13, 2025
Capped off vacuum lines and ports that were not necessary on multiple vehicles
Liberty Jones
April 8, 2025
I bought this pack because the bypass cap on my radiator had dry rotted and was leaking. I was admitted too lazy to measure so I bought this multipack to determine what size I needed. The cap did it’s job but slightly leaked if my drive was longer than 20 or so minutes. Definitely would not have trusted this for anything more than “just around town†driving to work and for errands.I ended up buying a reinforced cap of the same size for long term use, but I was glad that this worked for correct sizing and as a temporary solution. I keep the one I replaced in my glove box with an extra clamp in case of emergency.In a pinch, these will work but I wouldn’t trust them as a long term solution.
Ryan Anderson
March 30, 2025
Worked great for a plug on my radiator
Rsquad911
January 31, 2025
So hard to find these large sizes of hose/barb caps. This was perfect for my application!
Canuckrz
January 16, 2025
The 1/2" caps were a real pain to find as they kind of straddle the gap between vacuum caps and bypass caps, this kit was one of the very few places I could find them.
TV KQ
November 20, 2024
This is the only way to get 1/2" vacuums caps that I could find. Overall not bad for the price.
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