MasterCylinder No: 260-16520-BK

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Tandem Manual Master Cylinder for C2 Corvettes
Prod #: 260-16520-BK
Price: $369.30

Master Cylinder Dimensions
Bore Size 7/8"
Area (in²) 0.600
Stroke 1.10
Volume (cu in)
Master Cylinder Description
Type Tandem Outlet
Outlets 2
Material Aluminum
Finish Black E-coat
Res Type Integral
Res Size (oz) 7.8 / 4.7
Res Size(cu in) 14.0 / 8.5
UPC Number
UPC 889545101393
Product Documents
Rebuild Kit Product Data Sheet

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Tandem Manual Master Cylinder for C2 Corvettes - Product Summary

Machined from high-pressure die-cast aluminum, the Compact Tandem Master Cylinder weighs just 3.25 lbs., more than 50% less than the cast-iron factory tandem unit. Despite the compact size, it has a full 1.10” stroke and the fluid volume needed for high-performance multi-piston calipers. Finish options include gloss black e-coat, or a media burnished polished aluminum finish. Fluid outputs (1/2”-20 UNF) are provided on both sides of the bore. Plugs and fittings are included to accommodate 3/8”-24, 1/2”-20, and 9/16”-18 IF brake lines. Slotted mount flanges with 3.22” to 3.40” holes bolt right to the factory studs on the Corvette firewall and fit most other domestic cars and trucks from the era. Residual valves for drum brake cars and adjustable proportioning valves to dial in the brake bias are also available.

Two bore sizes provide the correct output for optimal braking performance on all models with Wilwood big brake kits, retrofits to tandem circuit master cylinders for 1963-64 drum brake cars, and a tuning option to provide a softer pedal feel with reduced effort on factory non-power disc brake equipped 1965-67 models.

NOTE: Due to space constraints, the optional proportioning valve mounting kit (P/N 260-14248) will not work with these C2 Corvette tandem master cylinders.

Master Cylinder Dimensions

Wilwood Tandem Manual Master Cylinder for C2 Corvettes Drawing Wilwood Tandem Manual Master Cylinder for C2 Corvettes Drawing Zoom Image
Additional Dimensions
Overall Length(in) 9.28"
Flange to End Length (in) 6.55"
Inlet Size (in)
Inlet Fit (in)
Outlet Size 1 (in) 1/2-20
Outlet Fit 1 (in) 3/8-24 IF or 1/2-20 IF
Outlet Size 2 (in) 1/2-20
Outlet Fit 2 (in) 3/8-24 IF or 9/16-18 IF
Additional Notes

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Version: 3.05 June 23, 2023