D8-4 Caliper – Part No: 120-10526-RD
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D8-4 Caliper Rear
Prod #: 120-10526-RD
Price: $405.39
D8-4 Caliper Rear - Product Summary
Caliper No: 120-10526-RD
D8-4 Caliper Rear

Piston Count 4
Piston Area (in²) 3.00
Piston Type Stainless
Dust Boot No
Rotor Dimensions
Rotor Width (in) 1.25
Rotor Diameter(in) 11.75
Pad Dimensions
Pad Area (in²) 10.29
Pad Volume (in³) 3.4
Duty Rating & Material
Material Forged Aluminium
Weight(Lbs) 6.3
Colors & Finish
Color Red
Finish Red Powder Coat

Mount Center(in) 5.16
Mount Position
Mount Side Universal
Mount Type Lug
UPC Number
UPC 889545000894
Product Documents
Product Data Sheet

Click To Download
Installation Instructions

WARNING: Cancer and Reproductive Harm
Applicable to Brake Pads Only

120-10526-RD - Product Description

D8-4 Caliper Rear

D8-4 rear calipers are a direct bolt-on replacement for the OE factory rear calipers on all 1965-82 Corvettes. Forged billet aluminum bodies, stainless steel pistons, and high temperature seals put an end to the rust, bore pitting, and seal failures that plague the original cast iron caliper design.

D8-4 calipers mount in the stock location over stock rotors and use the original type D8 brake pads. These calipers fit inside 1967 and later production steel rally wheels and most of the later model alloy wheels. Original steel “JK” code wheels from 1965-66, and some aftermarket alloy replica wheels, will requires a 3/16” or thicker wheel spacer for clearance.

D8-4 calipers use the same overall piston volumes as the original calipers. Other than a new flexline with an 1/8”-27 NPT end for the new aluminum caliper, no other changes such as master cylinder output or front to rear bias adjustment are necessary.

Product Specifications

Rotor Compatibility
Rotor Width (in) 1.25
Maximum Rotor Width (in) 1.25
Minimum Rotor Width (in) 1.17
Maximum Rotor Diameter(in) 11.75
Minimum Rotor Diameter(in) 11.75

Brake Pad Specifications
Brake Pad Type 1 D8
Brake Pad Type 2 N-A
Brake Pad Type 3 N-A
Total Pad Area (in²) 10.29
Total Pad Volume (in³) 3.4
Piston Specifications
Piston 1 Bore (in) 1.38
Piston 2 Bore (in) 1.38
Piston 3 Bore (in)
Total Piston Area (in²) 3.00

Mounting Specifications
Mount Type Lug
Mount Side Universal
Mount Center(in) 5.16
Mount Hole Size(in) 0.47
Mount Height(in) 2.99
Inlet Thread Size 1/8-27 NPT
Pad Dimensions & Part Numbers
Pad Dimensions for the D8-4 Caliper Rear Pad Dimensions for the D8-4 Caliper Rear Zoom Image
Axle Set P/N
Pad Type
Non-Bedded Pads - by Compounds
PM - ProMatrix
Mount Dimensions & Part Numbers

Dimensions for the D8-4 Caliper Rear Dimensions for the D8-4 Caliper Rear Zoom Image

Additional Notes

D8-4 calipers are the product of Wilwood’s in-house FEA design and 3-D modeling technology. With its unyielding strength and superior piston design, the D8-4 generates positive pedal response and high clamping efficiency with a substantial weight savings.

Parts & Accessories

O-Ring Kit 130-2658
Replacement Dust Boot N-A
Replacement Piston 1 200-7516
Replacement Piston 2 200-7516
Replacement Piston 3 N-A
Replacement Piston 4 N-A
Cross-Over O-Ring Kit 130-10540
Bridge Bolt Kit N-A
Wear Plate L/H 300-10523
Wear Plate R/H 300-10523
Pad Retainer 180-10524
Bleed Screw Kit 220-0627
Self Bleeder Tube N-A
Cross-Over Tube N-A
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Version: 3.05 June 23, 2023