NOS C5ZZ 2B091 B Brake Proportioning Valve

Here is an Ebay auction for an NOS C5ZZ 2B091 B disc brake proportioning valve by Ebay member "hot-rod-usa-1" with a Buy-It-Now of $649.99 or make offer:

Up for sale is an NOS Kelsey Hayes 74155 brake pressure reduction valve (most call it a proportioning valve). This is the part that Kelsey Hayes supplied to Ford for the 65-66 Mustang cars with the disc brake option . The part number Ford gave this part is C5ZZ 2B091 B this one comes in the Kelsey Hayes box that shows wear and has a torn flap . The part is me and unused . Take a look at the pictures as they show the exact cap that you will receive. Shipping will be $10.00 . Thank you for looking!!!!!

NOS 1965 1966 Ford Mustang Shelby GT 350 Brake Proportioning Valve C5ZZ 2B091 B | eBay

-Fred-

Quote from C6ZZKGT

Here is an Ebay auction for an NOS C5ZZ 2B091 B disc brake proportioning valve by Ebay member "hot-rod-usa-1" with a Buy-It-Now of $649.99 or make offer:

Up for sale is an NOS Kelsey Hayes 74155 brake pressure reduction valve (most call it a proportioning valve). This is the part that Kelsey Hayes supplied to Ford for the 65-66 Mustang cars with the disc brake option . The part number Ford gave this part is C5ZZ 2B091 B this one comes in the Kelsey Hayes box that shows wear and has a torn flap . The part is me and unused . Take a look at the pictures as they show the exact cap that you will receive. Shipping will be $10.00 . Thank you for looking!!!!!

NOS 1965 1966 Ford Mustang Shelby GT 350 Brake Proportioning Valve C5ZZ 2B091 B | eBay

-Fred-

This NOS C5ZZ 2B091 B disc brake proportioning valve sold December 17, 2025 on Ebay for $649.99.

-Fred-

Here is an Ebay auction for an NOS C5ZZ 2B091 B disc brake proportioning valve by Ebay member "OBSOLETE PARTS SOURCE" with a Buy-It-Now of $500.00 or make offer:

HERE WE HAVE A 1965-1966 FORD MUSTANG SHELBY BRAKE PROPORTIONING VALVE

THIS WAS A NOS VALVE BUT WAS POORLY STORED SO HAS OXIDATION ALL OVER SHOULD BE REBUILT THE FORD TAG FELL APART

DATE ON BACK IS 85-5 85TH DAY OF 1965

ORIGINAL FOR PART NUMBER C5ZZ-2B091-B

PLEASE LOOK THE PICTURES AND FEEL FREE TO ASK ANY QUESTIONS. THANKS

1965-1966 FORD MUSTANG SHELBY BRAKE PROPORTIONING VALVE C5ZZ-2B091-B | eBay

-Fred-

Quote from C6ZZKGT

Here is an Ebay auction for an NOS C5ZZ 2B091 B disc brake proportioning valve by Ebay member "Whitings Restoration" with a Buy-It-Now of $749.99 or make offer:

NOS 65-66 MUSTANG SHELBY GT-350 KELSEY HAYES DISC BRAKE PROPORTIONING VALVE. BOX HAS SEEN BETER DAYS AND THE ITEM HAS SHELF WEAR.

I will be listing several more mustang parts in the next couple of weeks so add WHITINGS RESTORATION ebay store to your favorite sellers list so you don't miss out on a part for that special project. I also have several other mustang parts for sale in my ebay store so check it out for your mustang needs. If you have questions about the parts in the picture or the description, please email me before you bid to avoid any problems. All sales are final NO RETURNS, if your not sure about what your buying don't buy it.

If you have a question about this part or any others give me a call or email me at ask seller a question. Whitings Restoration where we specialize in complete restorations, detailing and parts for 65-70 mustangs. Quality restorations at a reasonable price. MCA Thoroughbred and SAAC Division 1 Gold award winners.

Shane Whiting

[phone removed by eBay]

http://www.whitingsrestoration.net

NOS 65-66 MUSTANG SHELBY GT-350 KELSEY HAYES DISC BRAKE PROPORTIONING VALVE | eBay

-Fred-

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This NOS C5ZZ 2B091 B disc brake proportioning valve sold April 16, 2026 on Ebay for $749.99.

-Fred-