Wilwood 1" Bore Tandem Master Cylinder Kit | VW Type 1 Beetle | 4-Wheel Disc 50/50 Dual-Circuit
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Wilwood 1" Bore Tandem Master Cylinder Kit — VW Type 1 4-Wheel Disc Upgrade
This kit is the professional solution for anyone running 4-wheel disc brakes or dual-caliper setups on a VW Type 1 chassis. Stepping up from the standard 19mm bore to a 1" (25.4mm) master cylinder supplies the fluid volume needed to actuate larger performance calipers with a firm, responsive pedal feel.
Built around a lightweight, high-strength aluminum body with a true 50/50 dual-circuit output, this Wilwood cylinder has been adapted as a direct bolt-in for the VW Type 1 pan — eliminating the guesswork of custom mounting. Run the included reservoirs directly on the cylinder for a clean look or remote-mounted for easier access in tight builds.
Vehicle Fitment
- VW Type 1 (Beetle): All years — 4-wheel disc / dual-caliper brake conversions.
Why Choose Wilwood?
Wilwood's aluminum master cylinder is significantly lighter than a cast-iron unit and offers superior heat dissipation, while the 50/50 dual-circuit design keeps braking reliable even in the event of a single line failure. This kit is Made in the U.S.A.
Key Features & Benefits
- 1" Bore Aluminum Body: Lighter than cast iron with superior heat dissipation.
- VW Type 1 Specific Adapter: Pre-fitted for a seamless bolt-in on your pan.
- Dual-Circuit Safety: 50/50 pressure split maintains braking if a line fails.
- Plumbing Ready: Includes -3 AN banjo fittings and a brake switch fitting to simplify hard-line or flex-line installation.
- Flexible Reservoirs: Two 4 oz. reservoirs mount directly or remotely.
Technical Specifications
- Bore: 1" (25.4mm)
- Body: Lightweight aluminum
- Output: True 50/50 dual circuit (tandem)
- Fitment: VW Type 1 pan (includes specific mounting adapter)
- Included: Master cylinder, VW Type 1 pan adapter, custom pushrod & dust boot, brake light switch fitting, (2) -3 AN banjo fittings, (2) 4 oz. reservoirs
- Origin: Made in the U.S.A.
Frequently Asked Questions
- What bore size is this master cylinder? A 1" (25.4mm) bore, up from the standard 19mm, for the added fluid volume that larger performance calipers require.
- Will it bolt into a VW Type 1 pan? Yes. The kit includes a VW Type 1-specific adapter for a direct bolt-in with no custom mounting.
- Can the reservoirs be remote-mounted? Yes. The two 4 oz. reservoirs can mount directly on the cylinder or be remote-mounted for tight builds.