4C4Z-2A449-BA | Genuine Ford® R-12 Air Brake Relay Valve

SKU: 4C4Z-2A449-BA MPN: 4C4Z-2A449-BA

Every brake cycle depends on accuracy with the Genuine Ford R-12 Air Brake Relay Valve. Part number: 4C4Z-2A449-BA. Condition: new, compatible with 4200–9900 trucks, ProStar, LoneStar, and a wide range of vocational and bus platforms.

$189.00
No Core Charge
5 in stock, ready to ship

Pickup available at Warehouse - Howard st 7092 ste F

Usually ready in 24 hours

Need it fast? We offer overnight shipping

Contact us to check if overnight next-day delivery is available for your order - PN: 4C4Z-2A449-BA

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    Pickup available. Usually ready in 24 hours

Product Description

Product Name Air Brake Relay Valve Product Name Air Brake Relay Valve
Model R-12 Model R-12
Condition New Condition New
Brand Ford® Brand Ford®
Part Number 4C4Z-2A449-BA Part Number 4C4Z-2A449-BA
Cross Reference 4C4Z2A449BA, 4C4Z 2A449 BA Cross Reference 4C4Z2A449BA, 4C4Z 2A449 BA
Vehicle Compatibility
Severe Service 5900I, 7300, 7400, 7500, 7600, 7700 Severe Service 5900I, 7300, 7400, 7500, 7600, 7700
Medium Duty 4200, 4300, 4400 Medium Duty 4200, 4300, 4400
Premium Conventional 9200, 9400, 9900 Premium Conventional 9200, 9400, 9900
Linehaul ProStar, LoneStar, Linehaul Transport Linehaul ProStar, LoneStar, Linehaul Transport
Heavy Tractors 8500, 8600 Heavy Tractors 8500, 8600
Vocational & Specialty Applications HV (Medium Duty Engines), HV (Heavy Duty Engines), Medium Vocational, Heavy Extreme, Commercial Extreme Transport, Regional Haul Vocational & Specialty Applications HV (Medium Duty Engines), HV (Heavy Duty Engines), Medium Vocational, Heavy Extreme, Commercial Extreme Transport, Regional Haul
Bus Platforms CE 200/300 Series, FE 300, RE 300, IC RE Series, 3200 Bus Chassis, 3300 Bus Chassis, FBC Bus Chassis, Cutaway Commercial Bus Bus Platforms CE 200/300 Series, FE 300, RE 300, IC RE Series, 3200 Bus Chassis, 3300 Bus Chassis, FBC Bus Chassis, Cutaway Commercial Bus
Specifications
Crack pressure 4 PSI Crack pressure 4 PSI
Body Configuration 2 SUP / 4 DEL (2H + 2V) Body Configuration 2 SUP / 4 DEL (2H + 2V)
Control / Secondary Service Port 1/4-18 NPT Control / Secondary Service Port 1/4-18 NPT
Delivery Port 1 1/2-14 NPT Delivery Port 1 1/2-14 NPT
Delivery Port 2 1/2-14 NPT Delivery Port 2 1/2-14 NPT
Delivery Port 3 3/8-18 NPT Delivery Port 3 3/8-18 NPT
Delivery Port 4 3/8-18 NPT Delivery Port 4 3/8-18 NPT
Exhaust Port Dust Shield Exhaust Port Dust Shield
Maximum Operating Temperature 200 °F (93 °C) Maximum Operating Temperature 200 °F (93 °C)
Minimum Operating Temperature -40 °F (-40 °C) Minimum Operating Temperature -40 °F (-40 °C)
Mounting M8 x 1.25-6g Stud (2x) Mounting M8 x 1.25-6g Stud (2x)
Mounting Bracket Direction Down Mounting Bracket Direction Down
Mounting Bracket Location Above Cover Mounting Bracket Location Above Cover
Supply Port 1 1/2-14 NPT Supply Port 1 1/2-14 NPT
Supply Port 2 1/2-14 NPT Supply Port 2 1/2-14 NPT
Included Mounting Bracket Included Mounting Bracket

Useful Information

Description and Purpose:

The Genuine R-12 Air Brake Relay Valve manufactured by Ford, presented in new condition and cataloged under Part number: 4C4Z-2A449-BA, serves as a pneumatic control component within the air brake system. By rapidly distributing compressed air from supply ports to delivery lines, the valve helps ensure balanced brake actuation across multiple circuits. Cross reference: 4C4Z2A449BA, 4C4Z 2A449 BA.

Why Replacement is Important:

A worn relay valve may slow air delivery or disrupt pressure balance, which can affect braking response. Installing a properly functioning unit helps maintain reliable pneumatic control and predictable brake engagement.

Impact on Vehicle Performance:

Proper relay valve operation allows faster brake signal transmission and stable pressure distribution, supporting smoother braking response and improved control in demanding commercial driving conditions.

Manufacturer Information:

Ford® is a globally recognized automotive manufacturer with decades of experience in engineering vehicles, powertrains, and commercial transport technologies. 

Tags & Category: Air Brake Relay Valve, R-12 Relay Valve, Pneumatic Brake Valve, Truck Brake Valve, Air Pressure Valve, Brake Control Valve, Truck Air System, Relay Valve Component

Warranty:

Parts Finder Q offers a 365-days warranty for all types of parts in any condition. The warranty applies exclusively to purchases made directly through our website (partsfinderq.com). Please note that purchases made through third-party platforms like eBay or Amazon are not covered by this warranty.

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  • Icon Truck, Fast Delivery
    Free shipping over $199 Place an order today and receive it on Mar 6
  • Clock Icon
    Orders placed before 7-PM EST will ship same business day
  • Location icon, warehouse pickup point.
    Pickup available usually ready in 24 hours
  • Need it fast? We offer overnight shipping

    Contact us to check if overnight next-day delivery is available for your order - PN: 4C4Z-2A449-BA