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Wilwood Brakes Grand National GN6R 120-15778

Wilwood Brakes Grand National GN6R 120-15778
Wilwood Brakes Grand National GN6R 120-15778Wilwood Brakes Grand National GN6R 120-15778Wilwood Brakes Grand National GN6R 120-15778
$1,095.99 ea
NEWARRIVING SOONEstimated Ship Date 10/26/2022 (If Ordered Today)5 available from WILWOOD ENGINEERING as of 09/24/2022
Model: 3924598
Supplier has not provided any fitment data for this product.
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Grand National GN6R forged aluminum six-piston radial mount calipers bring current state-of-the-art design, materials, and manufacturing technology to this long standing icon in the Wilwood caliper line. With a High-strength forged aluminum body in a hard-anodized finish and Purpose built for rotors with a 1.30” thickness and a special bracket offset. Also these calipers come with Thermlock® insulated pistons.

About Wilwood Engineering

Wilwood Engineering designs and manufactures high-performance disc brake systems. Since the company’s inception in 1977 by Bill Wood, we have developed a substantial matrix of brake components and engineering techniques that allow us to quickly and reliably create brake systems for almost any application. Our core ability is the rapid development of custom engineered brake systems using a combination of off-the-shelf and custom components. In addition to designing and manufacturing brakes for all types of competitive motor sports, Wilwood also manufactures brake systems and components for agricultural equipment, industrial applications, utility vehicles, snowmobiles, quads, motorcycles and military vehicles.

With headquarters in Camarillo, California, Wilwood employs approximately 250 people. We have on-shelf stock of more than 300 different brake calipers, 200 rotor designs, 100 master cylinder designs and a wide assortment of brackets, fittings, valves and brake lines. Our off-shelf brake calipers range in size from tiny calipers used on go-carts and light duty industrial equipment, to heavy duty original equipment brakes for the U.S. military Humvee.

Wilwood's engineering department uses the latest computer-aided design and manufacturing techniques in conjunction with finite element analysis, dynamic test and cycle test equipment, to find high-performance and reliability solutions for the most difficult braking tasks. Our extensive inventory of proprietary on-the-shelf components allow us to provide cost-effective solutions for unique brake applications.

Wilwood is ISO 9000 compliant and has extensive experience maintaining quality levels of 100ppm or less for original equipment manufacturers.


Parts & Accessories
Bleed Screw Kit 220-0627
Cross-Over O-Ring Kit 130-10540
O-Ring Kit 130-3084
Replacement Piston 1 200-7551
Replacement Piston 2 200-7554
Replacement Piston 3 200-7554
Wear Plate L/H 300-5922
Wear Plate R/H 300-5923
Brake Pad Specifications
Brake Pad Type 1 7520
Total Pad Area (in²) 11.1
Total Pad Volume (in³) 6.9
Colors & Finish
Color Ano
Finish Type III Ano
Dust Boot No
Piston Area (in²) 5.40
Piston Count 6
Piston Type Thermlock
Mounting Specifications
Inlet Thread Size 1/8-27 NPT
Mount Center(in) 7.09
Mount Height(in) 2.33
Mount Hole Size(in) 0.45
Mount Side Right Hand
Mount Type Radial
Duty Rating & Material
Material Aluminum
Weight(Lbs) 7.8
Rotor Compatibility
Maximum Rotor Diameter(in) 13.28
Maximum Rotor Width (in) 1.30
Minimum Rotor Diameter(in) 11.75
Minimum Rotor Width (in) 1.25
Rotor Width (in) 1.30
Mount Center(in) 7.09
Mount Side Right Hand
Mount Type Radial
Pad Dimensions
Pad Area (in²) 11.1
Pad Volume (in³) 6.9
Piston Specifications
Piston 1 Bore (in) 1.75
Piston 2 Bore (in) 1.38
Piston 3 Bore (in) 1.38
Total Piston Area (in²) 5.40
Rotor Dimensions
Rotor Diameter(in) 13.28
Rotor Width (in) 1.30


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Muscle Cars & Classics 2022