5/8 Rectangular Master Cylinder, Polished

OVERVIEW

Upgrade your stopping power and add a high-performance aesthetic to your custom build with the Latest Rage 5/8-inch Bore Rectangular Master Cylinder. Specifically engineered for the demanding environments of sand rails, dune buggies, and custom air-cooled Volkswagen projects, this polished aluminum master cylinder offers a significant step up from standard economy units. The 5/8-inch bore size is meticulously chosen to provide the ideal balance between pedal pressure and fluid displacement, making it an excellent choice for builders looking to fine-tune their braking response. Whether you are navigating steep dunes or cruising the local strip, the tall rectangular reservoir ensures you have a consistent supply of hydraulic fluid, even during high-angle maneuvers that might starve a smaller, stock-style reservoir. The polished finish isn''t just about looks; it provides a smooth, easy-to-clean surface that resists the harsh elements often encountered in off-road racing and show-car circuits.

Versatility is at the core of this master cylinder''s design. While it is optimized for four-wheel brake systemswhere the increased fluid capacity of the rectangular reservoir is a major advantageit functions perfectly in two-wheel configurations as well. This unit is designed to fit the vast majority of aftermarket pedal kits found in the VW industry, utilizing a standard 2-1/4 inch vertical mounting pattern. The 1/8-inch NPT outlet provides a secure, leak-resistant connection point, though it does require a separate adapter to interface with your specific brake lines (typically -3AN or 3/16-inch inverted flare). By choosing this Latest Rage component, you are investing in a reliable hydraulic heart for your braking system that combines the rugged durability of off-road hardware with the refined finish of a premium street-legal component. It''s an essential piece of hardware for any enthusiast who refuses to compromise on either safety or style.

FITMENT

This master cylinder is a universal-style high-performance component typically used in the following applications:

• VW Dune Buggies: All years and models using aftermarket floor-mount or overhead pedal assemblies.
• Sand Rails & Woods Buggies: Ideal for custom tube-chassis builds.
• Baja Bugs: Perfect for modified Beetles running non-stock brake pedal clusters.
• Meyers Manx: Fits standard Manx and Manx-style fiberglass buggy builds.
• Custom Street Rods: Suitable for lightweight vehicles requiring a compact, polished master cylinder.
• Pedal Kit Compatibility: Fits most major brands including Latest Rage, Empi, Neal, and CNC (verify mounting centers).

SPECS

Detailed technical specifications for the AC799530P Master Cylinder:

• Bore Diameter: 5/8-inch (Ideal for specific pedal ratios and pressure requirements).
• Reservoir Style: Rectangular "Tall" version for increased fluid volume.
• Body Material: High-strength cast aluminum.
• Finish: High-luster polished aluminum.
• Outlet Port: Single 1/8-inch NPT (National Pipe Thread).
• Mounting Holes: 2-1/4 inches on center (Vertical 12 to 6 o''clock configuration).
• System Type: Compatible with 4-wheel or 2-wheel brake systems.
• Fluid Compatibility: Standard DOT 3 or DOT 4 brake fluid.

PRO TIPS

1. Always Bench Bleed Before Installation

Never install a new master cylinder without bench bleeding it first. Because this unit features a tall rectangular reservoir, air bubbles can easily become trapped in the bore during the initial fill. Use a bench bleeding kit to cycle fluid through the master cylinder on your workbench until all air bubbles are gone. This ensures that when you finally connect your brake lines, you aren''t pushing a massive pocket of air into your hard lines, which can make the final bleeding process at the wheels nearly impossible. Taking the extra ten minutes to do this on the bench will save you hours of frustration at the pedal.

2. Selecting the Correct NPT Adapter

It is important to remember that the outlet on this master cylinder is 1/8-inch NPT, which is a tapered pipe thread. This is not the same as the metric or inverted flare threads found on stock VW brake lines. You will need a 1/8-inch NPT to -3AN adapter or a 1/8-inch NPT to 3/16-inch inverted flare adapter to connect your lines. When installing the adapter, use a small amount of Teflon tape or pipe sealant on the threads, but ensure none of it gets inside the bore. Over-tightening NPT fittings can crack the aluminum housing, so tighten until snug and then add a quarter turn to seal.

3. Protect the Polished Finish During Maintenance

Brake fluid is an effective paint and polish remover. While the polished finish on this Latest Rage master cylinder is durable, spilled brake fluid can dull the shine or cause spotting if left to sit. Always keep a clean rag and a bottle of brake cleaner or soapy water nearby when filling or bleeding the system. If you do spill fluid on the polished body, wipe it off immediately and clean the area with a mild degreaser. To keep the master cylinder looking like new, you can occasionally apply a high-quality aluminum polish to maintain that mirror-like reflection in your cockpit or engine bay.