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PRODUCT DESCRIPTION
Product details
Superlite 4R Forged Narrow Radial Mount Caliper
The Forged Narrow Superlite 4R (FNSL4R) is Wilwood's newest iteration of the renowned 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 integrate "big brake" styling with Wilwood’s latest technology to generate big stopping power in extreme environments across a wide range of vehicles.
Key to the FNSL4R’s superior performance is its extremely durable and efficient body design. Starting at just 4.9 pounds, it is the result of solid modeling computer generated 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 grain structure of the metal to flow with the contour of the caliper body. It eliminates the stresses and interruptions to the internal grain structure that occur when machining a straight block. In short, there is no better way to build a stronger aluminum caliper body. Available in a range of piston diameters, it provides stopping for both front and rear caliper positions. 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 proprietary Thermlock pistons. This multi-piece piston design creates a highly efficient thermal barrier to further reduce heat transfer from the pads to the caliper body, seals, and fluid. Lower temperatures translate to longer service life and reduced chances of pedal fade due to heat.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 | Yellow |
| Finish | Yellow Powder Coat |
Mounting
| Mounting Centers (in) | 5.98 |
| Mounting Position | |
| Mounting Side | Universal |
| Mounting Type | Radial |
Specifications
Rotor Compatibility
| Rotor Width (in) | 1.10 |
| Maximum Rotor Width (in) | 1.10 |
| Minimum Rotor Width (in) | 1.00 |
| Maximum Rotor Diameter (in) | 14.00 |
| Minimum 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 Diameter 1 (in) | 1.38 | Piston Diameter 2 (in) | 1.38 |
| Piston Diameter 3 (in) | |
| Total Piston Area (in²) | 3.00 |
Mounting Specifications
| Mounting Type | Radial |
| Mounting Side | Universal |
| Mounting Center (in) | 5.98 |
| Mounting Hole Size (in) | 0.39 | Mounting Height (in) | 1.45 | Inlet Thread Size | 1/8-27 NPT |
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