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Custom 8" Dual Booster Wilwood Black Master Cylinder 1" Bore 260-8555-BK + Valve For Sale


Custom 8
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Custom 8" Dual Booster Wilwood Black Master Cylinder 1" Bore 260-8555-BK + Valve:
$484.86

Custom 8" Dual Booster Wilwood Black Master Cylinder 1" Bore 260-8555-BK + Valve
Universal Street Rod Custom Booster Master ComboThis listing is fora brand new 8" DUAL BLACK brake boosterwith blackout Wilwood master cylinder and Wilwood Proportioning Valve.The 8" dual booster offers 27% better stopping power over 8" single boosters, making this setup much better for increased safety on your vehicle. This is the best deal you'll find on a quality setup like this.The booster mounts with a 4-bolt pattern. The 4 bolts are in a perfect square and are 3 3/8" apart (center to center).

This Master Cylinder has a 1” bore and a black finish. It can be used in manual and power assisted. This Master is designed for mount flanges from 3.22” to 3.40”, common measurements for most domestic cars and trucks from the mid 1960s to present andoffer fluid outlet ports on both sides of the bore. The stroke is set at 1.10” with a volume ratio of 2:1 between the primary and secondary chambers. It is machined from high-pressure die castings, and weighs only 3lbs, a 75% weight savings over most cast iron OE type master cylinders.
The included combination proportioning valve substantially simplifies mounting, plumbing, wiring and brake proportioning adjustments on vehicles with custom brake systems. The combination block maintains full isolation between front and rear fluid circuits and can be used in conjunction with any outlet or dual mount master cylinder assemblies. The rear circuit has a single inlet and single outlet with the adjustable proportioning valve. The front circuit has a single inlet with two outlets. It can be run as a single outlet with one outlet plugged or used to split the plumbing on its way to the front calipers. This listing includes a bonus mounting bracket.

NewWilwood Black Aluminum Master Cylinder + Wilwood Proportioning Valve + 8" Dual Black Booster

This master cylinder features:

  • Aluminum
  • 1.00" Bore Size
  • Black E Coat

About this productProduct IdentifiersBrandWilwoodManufacturer Part Product ID (ePID)1538949194Product Key FeaturesPerformance PartYesMaterialAluminumTypeMaster CylinderDimensionsWeight305 Hundredths PoundsHeight5.1Width5.3Length10.2

Wilwood's chamber master cylinders are fully machined from a High-pressure die casting of a premium alloy, it incorporates slotted mounting flange to accommodatemount centers between 3.22" to 3.40" and also features side-hole mounts on 6.40" centers. Master cylinder has full separation between the front and rear chambers. Dual outlets allow for right or left hand plumbing based on mount location. Offers a total piston stroke of 1.10" and a 2:1 volume ratio between the primary and secondary chambers. Comes with a 1" bore size.

**Most of our Wilwood products are in stock and ready to ship. However, a few items may take 5-10 days to ship. If you are in more of a hurry for a Wilwood product, please call or email and we will make sure it is in stock for you before you buy.


This is truly a universal valve for any master cylinder. One front port can be plugged when only one port is needed for front brakes.

Please Note:No Instructions Included. Professional Installation Recommended



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