Tuesday, October 25, 2016
Aero4 Caliper – Part No: 120-13281-BK
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Aero4 Radial Mount Product Number: 120-13281-BK     Price: $488.93
Available Caliper #120-13281 Configurations

Black Caliper

Right Hand

Red Caliper

Right Hand

Black Caliper

Left Hand

Red Caliper

Left Hand

Caliper No: 120-13281-BK
Wilwood Aero4 Radial Mount Caliper

Wilwood Aero4 Radial Mount Caliper
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Aero4 Radial Mount
The new Aero4 forged four piston caliper delivers heavy duty stopping power for the road or track. The caliper incorporates race technology into a body design with widespread adaptability. Radial mounting, multiple options for piston volume, and a rotor diameter ranging from 12.88" to 15.00" give this caliper the versatility necessary to suit all types of heavy weight braking requirements. The new Aero4 is the latest innovation to the W4A / W6A series of calipers. It has been redesigned with internal fluid ports that eliminate the external fluid cross-over tubes and massive center bridge assembly.  

The body of Aero series is stress-flow forged from a premium grade aluminum alloy billet. Stress-flow forging realigns the metal's internal grain structure to flow within the contour of the caliper body. This process eliminates the stresses and interruptions to the internal grain structure that occur when machining a straight block billet. The results are a caliper with superior clamping efficiency and ultimate strength against fatigue, stresses, and distortion under load.    Continue >>

120-13281-BK - Product Summary
Count: Area (in²): Type: Dust Boot:
4 3.56 Stainless No
Rotor Dimensions
Rotor Width(In): Rotor Diameter(In):
1.25 15
Pad Dimensions
Pad Area (in²): Pad Volume (in³):
11 5.2
Mount Center(In): Mount Position: Mount Side: Mount Type:
7.09 Right Hand Radial
Duty Rating & Material
Material: Weight(Lbs):
Colors & Finishes
Color: Finish:
Black Black Powder Coat
Product Documents
Full Product Product Data Sheet Installation Instructions
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Vehicle Applications

Product Specifications
Rotor Compatibility
Rotor Width(In): 1.25
Maximum Rotor Width(In): 1.28
Minimum Rotor Width(In): 1.1
Maximum Rotor Diameter(In): 15
Minimum Rotor Diameter(In): 12.19
Brake Pad Specifications
Brake Pad Type 1: 6617
Brake Pad Type 2: N-A
Brake Pad Type 3: N-A
Total Pad Area (in²): 11
Total Pad Volume (in³): 5.2
Pad Dimensions & Part Numbers
Pad Dimensions for the Aero4 Radial Mount

Pad Dimensions for the Aero4 Radial Mount
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Piston Specifications
Piston 1 Bore(In): 1.62
Piston 2 Bore(In): 1.38
Piston 3 Bore(In):
Total Piston Area (in²): 3.56
Mounting Specifications
Mount Type: Radial
Mount Side: Right Hand
Mount Center(In): 7.09
Mount Hole Size(In): 0.45
Mount Height(In): 2.09
Inlet Thread Size: 1/8-27 NPT
Mount Dimensions & Part Numbers
Dimensions for the Aero4 Radial Mount

Dimensions for the Aero4 Radial Mount
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Parts & Accessories
O-Ring Kit: 130-9873
Replacement Dust Boot: N-A
Replacement Piston 1: 200-7519
Replacement Piston 2: 200-7516
Replacement Piston 3: N-A
Replacement Piston 4: N-A
Cross-Over O-Ring Kit: N-A
Bridge Bolt Kit: N-A
Wear Plate L/H: 300-5876
Wear Plate R/H: 300-5876
Pad Retainer: N-A
Bleed Screw Kit: 220-0627
Self Bleeder Tube: N-A
Cross-Over Tube: N-A