Wilwood 260-4893 Tandem Master Cylinder 1-1/16 in Bore Chrysler Style Universal

Vehicle Fitment

• Universal -- semi-universal fit
• Drag racing, stock cars, street rods, off-road
• Not a direct OEM replacement

Fitment Notes

• Chrysler-style firewall mount
• 2-hole mount, 3.20 in. center-to-center
• Push rod NOT included -- see PN 260-4894 for kit
• Optional pedal adapter bracket: 250-3677
• Outlet "A" → greater caliper bore end (usually front)
• Outlet "B" → lesser caliper bore end (usually rear)
• Disc below reservoir: add 2 lb residual valve (260-13706)
• Drum brakes: add 10 lb residual valve (260-13707)

Features

• Tandem dual-circuit design
• Dual outlet bores -- independent front/rear circuits
• Large-capacity integral plastic reservoir
• Standard OEM-style internals -- rebuildable
• Lightweight aluminum body
• Natural aluminum finish
• Two 3/16 in. brake line flare fittings included

Specifications

• Type: Tandem (Chrysler style)
• Bore: 1-1/16 in. (27mm)
• Max Stroke: 1.35 in.
• Primary Stroke ("A"): 0.90 in.
• Secondary Stroke ("B"): 0.45 in.
• Outlet "A": 1/2-20 inverted flare
• Outlet "B": 9/16-20 inverted flare
• Mount Thread: 3/8-24
• Material: Aluminum
• Finish: Natural
• Weight: 2.5 lbs.
• UPC: 889545067682

Included Components

• 1x tandem master cylinder with integral reservoir
• 2x 3/16 in. brake line flare fittings

Product Description

The Wilwood 260-4893 is a Chrysler-style aluminum tandem master cylinder with a 1-1/16 inch bore, built for custom disc brake systems in drag racing, late model stock car, street rod, and off-road applications. The tandem dual-circuit design provides a critical safety feature: if one circuit fails, the remaining circuit continues to build pressure for emergency braking.

Primary outlet "A" (1/2-20 flare) connects to the end with greater caliper bore area -- typically the front. Secondary outlet "B" (9/16-20 flare) connects to the rear. Mounts to the firewall using the standard Chrysler 2-hole pattern; can be adapted to aftermarket racing pedal assemblies with optional bracket 250-3677. Push rod and boot not included -- available as PN 260-4894. Full system bleed required before operation.