SKU: 260-8555 | UPC: 889545067958
Wilwood High Volume Tandem Master Cylinder – 1in Bore 260-8555 (1965+ Domestic Cars & Trucks)
Wilwood 260-8555 tandem master cylinder features a 1.00 inch bore for manual and power assisted brake setups on domestic cars and trucks from the mid 1960s to present. This aluminum unit delivers high volume output with a 1.10 inch stroke and 2:1 primary to secondary chamber ratio for consistent pedal feel and stopping power. At just 3 pounds it cuts weight by 75 percent over cast iron originals while fitting standard 3.22 to 3.40 inch mount flanges.
Key Features
- 1.00 Inch Bore: Handles manual brakes or power assist from vacuum or hydraulic boosters without pushrod included for custom setups
- Lightweight Aluminum Body: High pressure die cast construction weighs only 3 lbs for reduced unsprung weight and easier handling
- 1.10 Inch Stroke: Provides ample fluid displacement with 2:1 volume ratio between chambers for balanced front rear braking
- Dual Outlet Ports: 1/8-27 NPSF ports on both sides of bore allow flexible brake line routing left or right
- Mount Flange Compatibility: Matches 3.22 to 3.40 inch center spacing common on GM Ford Mopar vehicles 1965 to present
Product Notes
- Pair with Wilwood proportioning valve kit PN 260-13190 or retrofit kit PN 220-13189 for complete brake upgrade
- Plain machined aluminum finish resists corrosion in automotive environments
- Shipping weight 3.55 lbs in protective manufacturer packaging
Installation Notes
- Professional installation recommended.
- Verify firewall flange measures 3.22 to 3.40 inches center to center before install
- Pushrod and mounting hardware not included. source separately for manual applications
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1964-1972 | Chevrolet | Chevelle | All |
| 1967-1969 | Chevrolet | Camaro | All |
| 1965-1973 | Ford | Mustang | All |
| 1960-1987 | Chevrolet | C/K Pickup | 1500 2500 3500 |
| 1970-1974 | Dodge | Challenger | All |
| 1968-1972 | Chevrolet | Impala | All |
| 1964-1980 | Ford | F-100 | All |
Why Choose Wilwood?
- Trusted since 1977 for brake components on road race and street vehicles
- High pressure die castings ensure durability under high heat and pressure
- Precision machined internals deliver firm pedal response every time
Frequently Asked Questions
- Q: Does this master cylinder work with power brakes?
A: Yes the 1 inch bore supports vacuum or hydraulic power boosters on 1965+ domestic vehicles - Q: What finish does the 260-8555 have?
A: Plain machined aluminum for natural corrosion resistance and clean look - Q: What warranty covers this part?
A: Wilwood provides a one year manufacturer defect warranty with proper installation
Shipping & Handling
- Method: UPS Ground or FedEx Ground
- Availability: In stock – ships same or next business day
- Packaging: Original manufacturer box approximately 5 x 5 x 9 inches
- Weight: 3 lbs product weight 3.55 lbs shipping weight
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