Wilwood 120-16529 GN4R Radial Mount Caliper Left 4 Pistons

Grand National GN4R

Grand National GN4R forged aluminum four-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 1.25” thickness and a special bracket offset. Also these calipers come with Thermlock® insulated pistons.

Pistons

Piston Count	4
Piston Area (in²)	5.18
Piston Type	Thermlock
Dust Boot	No

Rotor Dimensions

Rotor Width (in)	1.25
Rotor Diameter(in)	14.00

Pad Dimensions

Pad Area (in²)	11.1
Pad Volume (in³)	6.9

Duty Rating & Material

Material	Forged Aluminium
Weight(Lbs)	8.0

Colors & Finish

Color	Anodize
Finish	Type III Anodize

Mounting

Mount Center(in)	7.09
Mount Position
Mount Side	Left Hand
Mount Type	Radial

Specifications

Rotor Compatibility

Rotor Width (in)	1.25
Maximum Rotor Width (in)	1.25
Minimum Rotor Width (in)	1.19
Maximum Rotor Diameter(in)	14.00
Minimum 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
Mount

Piston Specifications

Piston 1 Bore (in)	1.88
Piston 2 Bore (in)	1.75
Piston 3 Bore (in)
Total Piston Area (in²)	5.18

Mounting Specifications

Mount Type	Radial
Mount Side	Left Hand
Mount Center(in)	7.09
Mount Hole Size(in)	0.45
Mount Height(in)	2.33
Inlet Thread Size	1/8-27 NPT