41-66 Willys Jeep OEM NOS Vacuum Brake Booster Kit 934644
This is an AWESOME new old stock kit for adding brake power to your booster in old Willys Jeeps. Complete kit with instructions. OEM part number is 934644. There is an aftermarket available that is not as high quality and sells for $400, so I think this is a sweet option!
This is the way to greatly increase braking power and improve your brakes AND keep old school stock wheels by not having to upgrade to larger brakes. This kit is designed to be used with a stock single reservoir master cylinder and drum brakes. The stock master cylinder produces approximately 300 PSI of braking pressure. With the addition of a brake booster kit Installed paired with the remote vacuum tank, you can increase the pressure up to 870 PSI. The remote vacuum tank will also assist with vacuum reserve for windshield wipers operated by such.
46-64 Station Wagon
For drum brakes only with single reservoir original master cylinders only. Does not work with disc brakes or dual reservoir master cylinders.
Additional helpful info in this Jeep forum: https://www.oldwillysforum.com/forum/index.php?threads/herms-vacuum-brake-booster.14724/