Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
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Canadian Leaf

8 Inch Dual Brake Booster

Specs
Centerline of Holes:
3.38
Material Type:
Steel
Sold in Quantity:
Each
Overall Thickness:
5.25
Finish:
Zinc
Outside Diameter:
8.00
Bolt Hole Pattern:
3.38" x 3.38"
Garage Sale:
No
Notes
Dual diaphragm booster.
8 Inch Dual Brake Booster
8 Inch Dual Brake Booster

Click image to enlarge

Details

Reviews

Q & A

What's in the Box

Compact, 8" diameter for installation under floor or on firewall of almost any vehicle. Zinc chromate finish.

Booster Tech Tip (GIF) 

Brake System Builder's Tip (Link)

Learn more about the proper uses of residual valves by reading our tech article. Brake System Selection

Specs

  • 8" O.D.
  • 5-1/8" main body length
  • 10-1/2" overall length
  • Back of the booster to the end of the threaded plunger rod is 4-1/8"
  • Firewall mounting studs are ¾" long at 3-3/8" center-to-center
  • Front master cylinder studs are 1-1/8" long at 3-3/8" center to center

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Compact 7" dual diaphragm booster assembly for installation under floor or on firewall of almost any vehicle. Cast iron master cylinder has a 1" bore and is suited for disc-disc or disc-drum combinations.

Master cylinder features two 3/8"-24 inverted flare ports on each side (plugs are included for ports not in use).

Learn more about selecting the proper master cylinder for your vehicle by reading our tech article. Brake System Selection. 

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These show-quality polished stainless steel 7" boosters feature a dual diaphragm housing for use with heavier cars or pickups. Accepts most power brake master cylinders.

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Booster Tech Tip (GIF)

Learn more about selecting the proper brake booster for your vehicle by reading our tech article. Brake System Selection.  

Wilwood 261-13270 Aluminum Tandem Master Cylinder Kit with Bracket and Valve
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The combination proportioning valve substantially simplifies wiring and brake proportioning adjustments on vehicles with custom brake systems. The combination block maintains full isolation between front and rear fluid circuits and is specifically designed to accompany the Tandem Chamber Master Cylinder. The combo valve and bracket are black E-coated for a performance look and long lasting durability. Stainless steel fluid tubes are precision bent with preinstalled stainless tube nuts for a simple bolt-on installation between the Combination Proportioning Valve and the Wilwood Tandem Master Cylinder. Stainless steel button head fasteners thread into the bracket for a simple installation and years of durable, rust-free performance. Simply connect the fluid lines, bleed the system, and you're finished.

  • Bore size: 1-1/8"
  • 1.1" stroke
  • Dual tandem outlets - 1/2"-20
  • Fit size 1: 3/8"-24 IF or 1/2"-20 IF
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  • Integral res type
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Wilwood Tandem Master Cylinder Kit Product Data Sheet (PDF)

New Product Release (PDF) 

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These high-tech corvette-style master cylinders were designed using OE specifications and 100% tested.  They have a 1" bore and are suited for disc/drum combinations. Each master cylinder is ported on both the left and right sides, allowing for installation in many different applications. This exclusive design features a mating flange that works with applications requiring 3-1/8” through 3-3/8” bolt patterns.  These master cylinders will work with manual or power brake systems and can be quickly changed with the included adapter pin to plug the deep well.  The wide body and low profile gives this master cylinder the clearance you need when installing in tight areas and yet it maintains a large volume of fluid necessary for 2 and 4 wheel disc brake applications.

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Brake System Builder's Tip (Link)

Learn more about selecting the proper master cylinder for your vehicle by reading our tech article. Brake System Selection. 

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Brake System Builder's Tip (Link)

Note: Customers intending to use this as a manual brake pedal assembly should note that the pushrod and boot are not included.

Learn more about selecting the proper master cylinder for your vehicle by reading our tech article. Brake System Selection

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If your car currently has manual brakes and you want power brakes, you have to build a new mount for the brake booster. With this plate you will be able to bolt your booster to your existing 2-bolt master cylinder mount.

Fits boosters with four bolts on 3-3/8" centers. Fits master cylinder mounts with 3-1/4" or 3-3/8" centers.