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PRODUCT DESCRIPTION
Product details
Grand National GN6R
Grand National GN6R brake calipers, manufactured from forged aluminum with six radial mount pistons, incorporate the most advanced design, materials, and manufacturing technology into this iconic model in the Wilwood caliper line. They feature a high-strength forged aluminum body with Type III hard anodized finish and are compatible with rotors from 1.25" to 1.38" thick and diameters from 12.19" to 13.06". Two body widths are offered for use with either 0.80" (20.3) or 0.99" (25.0) thick pads. Base GN6R anodized models include stainless steel pistons, while GN6R/ST models include Thermlock® pistons. Use 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 |
| 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 Class & Material
| Material | Forged Aluminum |
| Weight (lbs) | 8.0 |
Colors & Finish
| Color | Anodized |
| Finish | Type III Anodized |
Mounting
| Mounting Center (in) | 7.09 |
| Mounting Position | |
| Mounting Side | Left |
| 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 Dia 1 (in) | 1.75 |
| Piston Dia 2 (in) | 1.38 |
| Piston Dia 3 (in) | 1.38 |
| Total Piston Area (in²) | 5.40 |
Mounting Specifications
| Mount Type | Radial |
| Mounting Side | Left |
| Mount Ctr (in) | 7.09 |
| Mount Hole Size (in) | 0.45 |
| Mount Height (in) | 2.33 |
| Inlet Thread Size | 1/8-27 NPT |
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