Brake Booster Kit with Vacuum Tank
Fits 41-66 Jeep & Willys

Brake Booster Kit with Vacuum Tank
Fits 41-66 Jeep & Willys

Remote Brake Booster Kit with Vacuum Tank

Finally additional stopping power for your Willys!!!! Get 2 to almost 3 times the braking power.

Convetional drum brakes generally create sufficient hydraulic pressure to be able to stop a vehicle when the pedal is applied.  But the chief difference and the major advantage of a power booster assisted brake system is the increased force that is exerted by the vacuum booster.

Applying pedal force increases the brake fluid pressure to the booster which closes the vacuum check valve and allows air into the back portion of the booster.  The mechanical pressure plus the air pressure pushing against a vacuum allows pedal travel with much less effort than a conventional hydraulic system.  Releasing the pedal opens the vacuum check valve and allows air to be purged from the canister for the next brake appiication.  

A standard drum brake pressure is about 250-300 psi of braking pressure.  The addition of the booster can incrase this to just under 800 psi of braking pressure.

The addition of the extra vacuum tank is for reserve vacuum which will assist in the operation of the booster and vacuum wipers if so equipped.

We have furnished a remote vacuum tank that will assist in the reserve vacuum for the brake booster as well as more vacuum for the vacuum wipers if your vehicle is so equipped.  This should be installed in between the vacuum source and the booster.

Helpful Guides and Illustrations:
Brake Booster Kit - Install and Tech Instructions
Willys Jeep Power Brake Upgrade - Classic Cars and Tools Blog

41-45 MB
41-45 GPW
46-49 CJ-2A
49-53 CJ-3A
53-64 CJ-3B
55-66 CJ-5
50-52 M38
52-66 M38A1
46-64 Truck
46-64 Station Wagon
48-51 Jeepster

For drum brakes only with single reservoir original master cylinders only. Does not work with disc brakes or dual reservoir master cylinders.

Item # Price

Availability: In stock

Add to Wishlist

Product Videos

Questions & Answers

Sort By: 


Questions: Will this 1967 CJ-5 4 cylinder?
Question By: John H Green on Sep 25 2020 2:46 PM
Yes, it sure will. Thanks
Answer By: Willys Jeep Parts Tech on Sep 28 2020 1:15 PM
Questions: Will this work on a 1970 Jeep with manual brakes and drums front and rear?
Question By: Casey Knight on Jan 23 2019 12:57 AM
Yes, as long as you a drum brakes all the way around and a single reservoir master cylinder.
Answer By: Willys Jeep Parts Tech on Jan 23 2019 6:05 AM
Questions: Mike- Unable to determine physical dimensions from illustration. Assume this booster would be mounted forward of carburetor on inside fender - driver side. Also noted that recommended mounting position is to be away from heat source. Above mounting position would place booster adjacent to exhaust manifold and pipe. Mounting booster on inside fender on passenger side, would require routing brake lines from master cylinder to passenger side and then back again to drivers side. Any suggestions? Best regards - Dave
Question By: DAVID A ENOCHSON on Aug 7 2018 5:07 PM
7" diameter booster that is 9" total in depth. Anywhere dry and free from a heat source is good. Alot of people mount on fender or firewall.
Answer By: Willys Jeep Parts Tech on Aug 7 2018 12:59 PM
Questions: I have a 45 cj2a with the original type of drum and master cylinder and would like to better the braking power. My engine compartment is pretty tight and really would like the physical measurements as the booster diameter and total length before I order the kit.
Question By: James M Fertsch on Jun 5 2018 11:49 PM
7" diameter booster that is 9" total in depth. Should have plenty of room on any Willys.
Answer By: Willys Jeep Parts Tech on Jun 6 2018 12:09 PM
Questions: What is the correct new installation of the brake pedal? If you move master cylinder in my 1955 CJ5, does this kit allow for reconnecting the brake pedal? The current master cylinder is below the pedal, all brake boosters I have seen are mounted above the brake pedal.
Question By: Chris Clark on Apr 22 2018 6:16 PM
Anywhere high and dry is recommended. Most people put on firewall or inner fender / frame. You line it in. See install instruction link.
Answer By: Willys Jeep Parts Tech on Apr 23 2018 6:09 AM
Questions: This won't work on my 67 CJ5?
Question By: Matt on Mar 29 2018 6:26 AM
Yes, as long as you have drum brakes both front and rear and a single reservoir master cylinder set up.
Answer By: Willys Jeep Parts Tech on Mar 29 2018 5:50 AM
Questions: I have a 1957 CJ5. Is there a place to find a picture of correct installation and how it attaches to the mater cylinder? From the installation instructions it appears to attach at the front of the master where the brake switch is suppose to be.
Question By: David on Feb 26 2018 5:22 PM
You line it into the master cylinder. Mount the booster in a clean area away from heat.
Answer By: Willys Jeep Parts Tech on Feb 26 2018 10:13 AM
Questions: Hello, I am restoring a 1953 CJ-3a. I would like to go to disk brakes on the build. is there a booster setup available that works with your disk brake conversion kit?
Question By: Leland Redfern on Jan 5 2018 5:10 PM
No, this booster is for drum / drum brakes only. I dont have a booster kit that is for disc brakes. Really if you use our disc kit they should have good braking power with our disc dual reservoir master cylinder kit.
Answer By: Willys Jeep Parts Tech on Jan 5 2018 9:58 AM
Questions: The diagram and logic seem to fit a single reservoir master cyclinder. I have already upgraded to the dual master cyclinder, should I go back to the single?
Question By: Elvis Hood on Sep 14 2017 8:53 PM
This booster kit is for single reservoir drum brakes only.
Answer By: Willys Jeep Parts Tech on Sep 15 2017 5:44 AM
Questions: Is this booster kit compatible with silicon brake fluid?
Question By: Dave on May 29 2017 5:47 PM
We typically use Dot 3.
Answer By: Willys Jeep Parts Tech on May 30 2017 5:36 AM
Questions: Where is the best place to mount this?
Question By: Michael Meditz on Mar 31 2017 4:33 PM
I recommend in the engine compartment away from a heat source.
Answer By: Willys Jeep Parts Tech on Mar 31 2017 9:33 AM