Product Summary

Universal Fit, Firewall Position, Tandem Outlet Count

  • It is compatible with manual or power brake system applications
  • A slotted flange mounting makes it a simple bolt on for many OE mounts
  • Available with a 1-1/8” bore size and they come in your choice of standard, ball burnished, or black E-coat finishes
  • Stainless steel fluid tubes are precision bent with preinstalled stainless tube nuts for a simple bolt-on installation
  • The combination proportioning valve substantially simplifies wiring and brake proportioning adjustments on vehicles with custom brake systems
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Key Specs

MFG. Part #
BrandWilwood
Master Cylinder Bore Size1-1/8 Inch
Master Cylinder MaterialAluminum
Finish
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Need To Know

Quick and Easy Returns

Return Policy

Details

These Aluminum Tandem Chamber Master Cylinder kit from Wilwood comes with a Combination Proportioning Valve, mounting bracket, fluid tubes and mounting hardware. The Tandem Master Cylinder represents the latest in refinements in brake pressure actuation and fluid control. The slotted flange mounting makes it a simple bolt on for many OE mounts including the popular Chrysler, Corvette, GM, and Ford Mustang bolt patterns and is compatible with manual or power brake system applications. Master cylinders are available with a 1-1/8” bore size and they come in your choice of standard, ball burnished, or black E-coat finishes.

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
  • Fit size 2: 3/8"-24 IF or 9/16"-18 IF
  • Integral res type
  • Aluminum
  • Choose from standard, ball burnished, or black E-coat finish

Charts

Specifications

KEY SPECS
MFG. Part #
BrandWilwood
Master Cylinder Bore Size1-1/8 Inch
Master Cylinder MaterialAluminum
Finish
GENERAL
PositionFirewall
Brake System TypeDisc
Outlet CountTandem
Reservoir TypeIntegral
Stroke1.1"
Color
Reservoir IncludedYes
Number of Mounting Holes2
Reservoir MaterialAluminum
Reservoir Size (cu in)14.4 or 8.7
Fluid Capacity8.0 / 4.8 fl oz.
Area0.970 sq. in.
Master Cylinder Cap IncludedYes
Hardware IncludedYes
Pushrods IncludedNo
Mounting Bracket IncludedYes
Outlet Fitting3/8"-24 IFF or 1/2"-20 IFF
Outlet Fitting 23/8"-24 IFF or 9/16"-18 IFF
Overall Length8.76"
Mounted Length8.15"
Centerline of Holes3.2"
Sold in QuantityEach
GTIN Code

Ratings & Reviews

5

7 Reviews

Overall Assessment

Customers are overwhelmingly satisfied with this car part's top-quality, usability, and suitability for their cars, ranging from 37 Ford street rods to 1969 Camaros. They consistently mention its excellent fitment, easy installation, and great performance. Notably, customers are also impressed by the superior quality of the part, which functions perfectly as designed and adds substantial value to their vehicles. Reports highlight the ease of setup and its superior features – a direct contrast to competitor offerings. Many are likely to repurchase, indicating a strong endorsement.

5

7 reviews

5

7

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Great buy and great service

5.0

2 years ago

C10

North Port FL

Verified

Making a Hydro boost brake system with this booster

Would Recommend

Another great product from wilwood

5.0

2 years ago

Dan

United Kingdom

Was as descirbed... feels very well made as should expect from Wilwood. Very much looks the part (its very nice addition to my engine bay). Would buy again without fail

Would Recommend

YES I WOULD BUY THIS AGAIN AND PROBLEY WILL FOR A OTHER CAR

5.0

3 years ago

MR FORD

WI

Verified

Put this part on a 37 ford street rod, worked perfect!

Would Recommend

Very good quality with excellent fitmemt

5.0

3 years ago

Dan

Oklahoma

Verified

On my car as designed.

Would Recommend

Great service great products

5.0

3 years ago

Jjaydent

Nc

Verified

Great service great products great service

FANTASTIC CUSTOMER SERVICE AND GREAT PARTS SELECTION…EXCEL…

5.0

5 years ago

Geno

Walnutcreek CA

Verified

FOR MY 1969 CAMARO

Would Recommend

Definitely a Quality part

5.0

5 years ago

Vince

AZ

Verified

Looks and works great, easy install and setup

Would Recommend

Showing 7 of 7 reviews

Questions & Answers

2 Questions • 2 Answers

What brake booster would work with this Master Cylinder ? I dont think Im cross-refrencing the boosters correctly with the master cylinder mounting bolts as 3.38" seems to be popular for most of your boosters and Im not finding any for this 3.2" bolt pattern.

by Jody Holton

• 7 years ago

1 answer

master cylinder swap if I purchase your under dash brake booster master cylinder and peddle combo unit , can I swap the master cylinder with the wilwwod 261-13270?

by joeyt

• 11 years ago

1 answer

2 of 2 questions shown

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