Relay Valves for Peterbilt, Kenworth, Freightliner, International, Volvo, Western Star, Hino, Caterpillar, Mack, and other Big Rigs.

R-12 Air Brake Relay Truck Trailer Valve - Vertical Ports
R-12 Air Brake Relay Truck Trailer Valve - Vertical Ports

R-12 Air Brake Relay Truck Trailer Valve - Vertical Ports

Relay Valves
$63.99
2 Port Single Control Line Tractor/Trailer Relay Valve
2 Port Single Control Line Tractor/Trailer Relay Valve

2 Port Single Control Line Tractor/Trailer Relay Valve

Relay Valves
$57.99
RG2-2 Port Truck Trailer Air Brake Relay Valve
RG2-2 Port Truck Trailer Air Brake Relay Valve

RG2-2 Port Truck Trailer Air Brake Relay Valve

Relay Valves
$40.99
FF2 Full Function Trailer Brake Valve - 3/4" Reservoir
FF2 Full Function Trailer Brake Valve - 3/4" Reservoir

FF2 Type Full Function Trailer Brake Valve - 3/4 Inch Reservoir

Relay Valves
$87.99
FF2 Full Function Trailer Brake Valve - 3/4" Reservoir
FF2 Full Function Trailer Brake Valve - 3/4" Reservoir

FF2 Type Full Function Trailer Brake Valve - 1/2 Inch Reservoir

Relay Valves
$87.99
R-12 Relay Valve 3/8" Delivery
R-12 Relay Valve

R-12 Relay Valve 3/8 Inch Delivery

Relay Valves
$58.99
R-12 Relay Valve 1/2" Delivery
R-12 Relay Valve 1/2" Delivery

R-12 Relay Valve 1/2 Inch Delivery

Relay Valves
$58.99
R-12P 4 Port Pilot Relay Valve
R-12P 4 Port Pilot Relay Valve

R-12P 4 Port Pilot Relay Valve

Relay Valves
$78.99
R-8 Relay Spring and Service Brake Valve - 90 Degrees Service Port
R-8 Relay Spring and Service Brake Valve - 90 Degrees Service Port

R-8 Relay Spring and Service Brake Valve - 90 Degrees Service Port

Relay Valves
$78.99
R-12 Relay Rear Axle Service Parking Brakes 4 Port Delivery Valve - Vertical Mount
R-12 Relay Rear Axle Service Parking Brakes 4 Port Delivery Valve - Vertical Mount

R-12 Relay Rear Axle Service Parking Brakes 4 Port Delivery Valve - Vertical Mount

Relay Valves
$67.99
R-14 Relay Air Brake Spring and Service System Valve - Horizontal Delivery Ports
R-14 Relay Air Brake Spring and Service System Valve - Horizontal Delivery Ports

R-14 Relay Air Brake Spring and Service System Valve - Horizontal Delivery Ports

Relay Valves
$58.99
2 Delivery Port Tractor Trailer Service Relay Brake Valve - 3/8 Inch - 1/2 Inch NPT - Nipple Mount
2 Delivery Port Tractor Trailer Service Relay Brake Valve - 3/8 Inch - 1/2 Inch NPT - Nipple Mount

2 Delivery Port Tractor Trailer Service Relay Brake Valve - 3/8 Inch - 1/2 Inch NPT - Nipple Mount

Relay Valves
$67.99
4 Port Trailer Relay Valve - 3/8" Delivery Port
4 Port Trailer Relay Valve - 3/8" Delivery Port

4 Port Trailer Relay Valve - 3/8 Inch Delivery

Relay Valves
$58.99
R-6 Style Service Relay Valve - Vertical Ports
R-6 Style Service Relay Valve - Vertical Ports

R-6 Style Service Relay Valve - Vertical Ports

Relay Valves
$58.99
Control Line Relay Valve - 3/8" Ports
Control Line Relay Valve - 3/8" Ports

Control Line Relay Valve - 3/8 Inch Ports

Relay Valves
$67.99
R-8P Style Pressure Equalizing Relay Valve
R-8P Style Pressure Equalizing Relay Valve

R-8P Style Pressure Equalizing Relay Valve

Relay Valves
$87.99
R-6 Style Brake Relay Valve
R-6 Style Brake Relay Valve

R-6 Style Brake Relay Valve

Relay Valves
$58.99
2 Port Anti-Compounding Relay Valve
2 Port Anti-Compounding Relay Valve

2 Port Anti-Compounding Relay Valve

Relay Valves
$87.99