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PRODUCT DESCRIPTION
Product details
Grand National GN6R
The Grand National GN6R forged aluminum, radial mount six-piston calipers incorporate the latest in design, materials, and manufacturing technology to this iconic model in the Wilwood caliper line. They feature a high-strength forged aluminum body with a Type III hard anodized finish and are compatible with rotors from 1.25” to 1.38” thick and 12.19” to 13.06” in diameter. Two body widths are offered for use with either .80” (20.3) or .99” (25.0) thick pads. Standard anodized GN6R models include stainless steel pistons, while GN6R/ST models include Thermlock® pistons. Uses 3.5” or 6.0” center mount bracket kits to replace all previous Grand National brake caliper models.
Pistons
| Piston Quantity | 6 |
| Piston Area (in²) | 5.40 |
| Piston Type | Thermlock |
| Dust Boot | No |
Rotor Dimensions
| Rotor Width (in) | 1.38 |
| Rotor Diameter (in) | 13.06 |
Pad Dimensions
| Pad Area (in²) | 11.1 |
| Pad Volume (in³) | 6.9 |
Service Rating & Material
| Material | Forged Aluminum |
| Weight (lbs) | 8.2 |
Colors & Finish
| Color | Anodized |
| Finish | Type III Anodized |
Mounting
| Mounting Center (in) | 7.09 |
| Mounting Position | |
| Mount Side | Right |
| Mount Type | Radial |
Specifications
Rotor Compatibility
| Rotor Width (in) | 1.38 | ||
| Max Rotor Width (in) | 1.38 | ||
| Min Rotor Width (in) | 1.25 | ||
| Max Rotor Diameter (in) |
| Min Rotor Diameter (in) |
12.19 |
|
Brake Pad Specifications
| Brake Pad Type 1 | 7520 |
| Brake Pad Type 2 | N-A |
| Brake Pad Type 3 | N-A |
| Total Pad Area (in²) | 11.1 |
| Total Pad Volume (in³) | 6.9 |
| Mounting |
Piston
Piston Specifications| Piston 1 Diameter (in) | 1.75 |
| Piston 2 Diameter (in) | 1.38 |
| Piston 3 Diameter (in) | 1.38 |
| Total Piston Area (in²) | 5.40 |
Mounting Specifications
| Mount Type | Radial |
| Mount Side | Right |
| Mounting Center (in) | 7.09 |
| Mounting Hole Size (in) | 0.45 |
| Mount Height (in) | 2.33 |
| Inlet Thread Size | 1/8-27 NPT |
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