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PRODUCT DESCRIPTION
Product details
Superlite 4R Narrow Radial Mount Forged Caliper
The Forged Narrow Superlite 4R (FNSL4R) is our newest version of the venerable Superlite caliper series. It adds the versatility and convenience of radial mounting to this popular caliper group. Radial mounting simplifies adaption and provides two planes of adjustment for precise alignment over the rotor. These calipers incorporate “Big Brake” style with Wilwood’s latest technology to generate big stopping power in extreme environments and 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 solid modeling computer generated design and FEA stress analysis technology. The most distinguishing 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 of the metal to flow with 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 make a stronger aluminum caliper body. Available in various piston diameters, it offers braking 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 exclusive Thermlock® pistons. This multi-piece piston design creates a highly efficient thermal barrier to further reduce heat transfer from the pads into the caliper body, seals, and fluid. Lower temperatures mean longer life and reduced chance of pedal fade from heat.
Pistons
| Number of Pistons | 4 |
| Piston Area (sq. in.) | 3.00 |
| Piston Type | Stainless Steel |
| Dust Boot | No |
Rotor Dimensions
| Rotor Width (in.) | 1.10 |
| Rotor Diameter (in.) | 14.00 |
Pad Dimensions
| Pad Area (sq. in.) | 8.2 |
| Pad Volume (cu. in.) | 3.8 |
Service Rating & Material
| Material | Forged Aluminum |
| Weight (lbs) | 5.0 |
Colors & Finish
| Color | Anodized |
| Finish | Type III Anodized |
Mounting
| Mounting Center (in.) | 5.98 |
| Mounting Position | |
| Mounting Side | Universal |
| Mounting 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.) |
| 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 (sq. in.) | 8.2 |
| Total Pad Volume (cu. in.) | 3.8 |
| Mounting |
Piston Specifications
| Piston Bore 1 (in.) | 1.38 |
| Piston Bore 2 (in.) | 1.38 |
| Piston Bore 3 (in.) | |
| Total Piston Area (sq. in.) | 3.00 |
Mounting Specifications
| Mounting Type | Radial |
| Mounting Side | Universal |
| Mounting Center (in.) |
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