Wilwood 120-14056 FNSL4R 4-Piston Universal Radial Brake Caliper, Red

Forged Narrow Superlite 4R Radial Mount Caliper

The Forged Narrow Superlite 4R (FNSL4R) caliper is our newest version of the time proven Superlite caliper series. It adds the versatility and convenience of radial mounting to this popular caliper group. Radial mounting simplifies adaptation and provides two planes of adjustment for precise alignment over the rotor. These calipers combine big brake styling with Wilwood’s latest technology to generate big stopping power in extreme environments and across a wide range of vehicles.

The key to the FNSL4R’s superior performance resides in its extremely durable and efficient body design. Starting at 4.9 pounds, it is the result of computer generated solid modeling and FEA stress analysis technology.

The most outstanding feature of this new caliper design is the forging. Each body is stress-flow forged from premium grade aluminum alloy billets. This process re-aligns the internal metallic grain structure to match the contour of the caliper body. It eliminates the stresses and interruptions in the internal grain structure that occur when machining a straight block. In summary, there is no better way to build a stronger aluminum caliper body. Available in a choice of piston diameters, they provide braking for both front and rear caliper applications. Standard FNSL4R calipers incorporate one-piece stainless steel pistons. Stainless steel is used for its low heat transfer properties and high resistance to corrosion. Calipers can be upgraded with Wilwood’s exclusive Thermlock pistons. This multi-component piston design creates a highly efficient thermal barrier to further reduce heat transfer from the pads to the caliper body, seals, and fluid. Cooler temperatures translate to longer service life and reduced chances of pedal fade due to heat. Dust Boot No

Rotor Dimensions

Rotor Width (in)	1.10
Rotor Diameter (in)	14.00

Pad Dimensions

Pad Area (in²)	8.2
Pad Volume (in³)	3.8

Service Rating & Material

Material	Forged Aluminum
Weight (lbs)	5.0

Colors & Finish

Color	Red
Finish	Red Powder Coat

Mounting

Mounting Center (in)	5.98
Mount Position
Mount Side	Universal
Mount Type	Radial

Specifications

Rotor Compatibility

Rotor Width (in)	1.10
Max Rotor Width (in)	1.10
Min Rotor Width (in)	1.00
Max Rotor Diameter (in)	14.00
Min Rotor Diameter (in)	11.75

Brake Pad Specifications

Brake Pad Type 1	7416
Brake Pad Type 2	N-A
Brake Pad Type 3	N-A
Total Pad Area (in²)	8.2
Total Pad Volume (in³)	3.8
Mounting

Piston Specifications

Piston 1 Bore (in)	1.38
Piston 2 Bore (in)	1.38
Piston 3 Bore (in)
Total Piston Area (in²)	3.00

Mounting Specifications

Mount Type	Radial
Mount Side	Universal
Mount Center (in)	5.98
Mount Hole Size (in)	0.39
Mount Height (in)	1.45	Inlet Thread Size	1/8-27 NPT