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Wilwood High Volume Aluminum Master Cylinder

SAME DAY SHIPPING! Order within the next 17 hours 31 minutes and receive same day shipping

Specs
Centerline of Holes:
2.25
Material Type:
Aluminum
Overall Height:
4.50
Overall Width:
2.55
Sold in Quantity:
Each
Finish:
Natural
Thread Length:
1.88
Thread Pitch:
5/16"-24
Mounted Length:
5.25
Bore Size:
-
Feed:
Single
Outlet Fitting:
1/8" NPT
MFG. Part #:
-
Garage Sale:
No
Notes
3.50" pushrod
Wilwood High Volume Aluminum Master Cylinder

Click image to enlarge

Details

Reviews

Q & A

What's in the Box

Wilwood high-volume aluminum master cylinders have the highest fluid capacity of any integral reservoir design. With a total capacity of 8.2 ounces, there is at least 26% more fluid than most competitive brands. More fluid volume means cooler temperatures and additional insurance for extreme conditions where high pad wear can compromise fluid levels during long events. With 1-7/16" of piston travel, there is plenty of margin when used with large four or six piston calipers.

An internal slosh baffle guarantees a constant fluid supply to the bore chamber during hard cornering, acceleration and braking. This unique baffle also eliminates aeration into the reservoir from return fluid that can occur during brake release and bleeding procedures.

  • Die-cast from high-grade aluminum
  • Heavy-duty internal piston springs provide fast retraction for immediate release and positive fluid transfer without the need for cumbersome external pushrod springs
  • Pedal feel is improved, piston retraction is guaranteed, fluid recovery is quicker and the bleeding process is simplified
  • Formed steel lids, heavyweight bail wires and bellows type gaskets keep the fluid in and the moisture out with correct pressure balancing during fluid displacement
  • 1/8"-27 NPT fluid port

835-260676 Instructions (PDF)

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

Customer Reviews

Rated 4.7 out of 5 by 7 reviewers.
RATING BREAKDOWN
7 reviews
5 Stars
5
4 Stars
2
3 Stars
0
2 Stars
0
1 Star
0
RECOMMEND THIS PRODUCT:

KasK

This is a great product

September 29, 2013
I used this with two calipers and it works great!!
Yes, I recommend this product.
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Ron white
Verified Purchaser
Elizabeth Colorado

Great product - exactly what I expected

January 03, 2012
Great product
Pros:
  • Easy To Install
  • No Fade
  • Decreased Stopping Distance
  • Lightweight
Yes, I recommend this product.
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Seidelman racing Ent.
Verified Purchaser
Spanaway Washingtom

works great for vintage race car

December 30, 2011
this product replaces the old chevy truck master cylinder on vintage race cars it gives you good pease of mind when stepping on the brakes those old halibrand spot brakes were never the best brakes on the market in the first place.
Pros:
  • Easy To Install
Yes, I recommend this product.
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Super 5
Verified Purchaser
Golden Valley, Arizona

perfect fit

August 29, 2011
I used the 1" Wilwood Master to replace my 7/8" Master when I changed to a Disc Brake rear axle assy. I purchased the Winters floater axle (Grand National Style) rear axle assembly and installed the "Big Bore" metric calipers, which require the larger volume of brake fluid. Everything worked perfect, I could not ask for better brakes.
Pros:
  • Easy To Install
  • Lightweight
Yes, I recommend this product.
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Shotrod
Verified Purchaser
Broken Arrow, OK

Just what the "doctor " ordered!Perfect!

March 25, 2011
This product was the grand finally of a made from scratch brake system on my project. Perfect!!!
Pros:
  • Decreased Stopping Distance
  • Lightweight
  • No Fade
  • Easy To Install
Yes, I recommend this product.
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Russ Ellis aka The Minister of Sinister
Verified Purchaser
Phoenix AZ

Brakes Review

January 13, 2011
Used this one a few times now. Works well and a good value for the money. Use the double master setup for a +2500 heavier vehicle or for advanced stopping power. We use this with the 8353401290 swing pedal which worked good for us.
Pros:
  • Lightweight
  • Easy To Install
  • Decreased Stopping Distance
Yes, I recommend this product.
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Paul
Woodburn, OR

Easy to bench bleed and install

May 10, 2010
Offers various bore sizes for your application. I used two Master Cylinders 1" bore for the rear drum brakes and the 3/4" bore for the front disc brakes
Yes, I recommend this product.
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Page 1 of 1

Product Q&A

9 questions : 9 answers

1 answers

What is the Thread size for the push rod? Is this usable to a clevis style connector that you offer to attach to a swing pedal?

EarlyCJ
August 07, 2014

What is the Thread size for the push rod? Is this usable to a clevis style connector that you offer to attach to a swing pedal?

Answers

August 08, 2014
EricM
This master cylinder has a 5/16"-24 threaded pushrod. It is best suited for an aftermarket pedal assembly such as 8353401290 or a dual master cylinder pedal 8353401287. If you simply need a clevis to add to the pushrod we offer part number 91631516.
1 answers

What size bores for a brake system and one for a hydraulic clutch? I have 1927 T coupe 2.5 Chevy 4cyl & 5spd out of a S10, early ford juice brakes, speedway swing pedals. I would like to use one for the brakes and one for the clutch. What size bores would you recomend for each one thanks Paul

Polyester
Vacaville, CA, USA
November 10, 2013

What size bores for a brake system and one for a hydraulic clutch? I have 1927 T coupe 2.5 Chevy 4cyl & 5spd out of a S10, early ford juice brakes, speedway swing pedals. I would like to use one for the brakes and one for the clutch. What size bores would you recomend for each one thanks Paul

Answers

November 12, 2013
Jason
The bore size on master cylinders number 835260676 is commonly the same size bore as the slave cylinder or hydraulic throw out bearing or you can verify it with the manufacturer for the clutch. On the brakes if you are considering the tri mount a 1 inch for the disc in front and generally a ¾ or 7/8 for the rear drums. The balance bar on the pedal assemblies will fine tune the brake system. One master cylinder in this size is not recommended for all 4 wheels.
1 answers

what is the height including cap

kellybar
Fl.
July 04, 2013

what is the height including cap

Answers

July 05, 2013
Jason
From the bottom of the master cylinder(not including mounting flange) to top of cap is 4.64". Willwood has a drawing of this part listed on there website, www.wilwood.com and search part #260-6764
1 answers

what bore siz would you recmmomend on a race car to use as front master and then for the rear master?.. 2 master cylinder system..stock brake calipers..stock chevy disc calipers in front..stock ford disc calipers inrear.

Rwdracer47
corbin, ky
May 28, 2013

what bore siz would you recmmomend on a race car to use as front master and then for the rear master?.. 2 master cylinder system..stock brake calipers..stock chevy disc calipers in front..stock ford disc calipers inrear.

Answers

May 29, 2013
Jason
I would recommend a 7/8” bore master cylinder for the front and a 7/8” bore master cylinder for the rear also with your caliper arrangement.
1 answers

Can this master cylinder be used without a brake booster on the street?

Julio
Staten Island , NY
January 20, 2011

Can this master cylinder be used without a brake booster on the street?

Answers

January 23, 2011
Waymon
Yes, part number: 835260676 can be used on the street without a booster if you order one with a 1 inch bore.
1 answers

I would like to know Length for this items. Thank you Thor

Thor
Bangkok Thailand
July 28, 2011

I would like to know Length for this items. Thank you Thor

Answers

July 29, 2011
QC
This part is 9.15" over all length and 4.875" long from the firewall side of the mount to the front of the mc.
1 answers

can you use this on a t bucket with 4 wheel disc.non power ?

July 16, 2011

can you use this on a t bucket with 4 wheel disc.non power ?

Answers

July 18, 2011
John
This master cylinder fills the need for many hot rod applications. In the application of a T bucket with four wheel disc brakes to insure proper braking and sufficient available fluid we would suggest using TWO of these master cylinders in a kit such as part number 91029972 or 91029975. This would in sure sufficient fluid for the calipers and offer adjustability for front and rear percentage of braking. If wanting a compact under the floor set up for a T bucket we would suggest part number 91631926.
1 answers

Can this MC be used with a stock OEM Booster and is it applicable on a vehicle that has disc brakes front and rear? Would 7/8 or 1" be best for the application described above?

Brian
Pollock Pines, CA
June 13, 2011

Can this MC be used with a stock OEM Booster and is it applicable on a vehicle that has disc brakes front and rear? Would 7/8 or 1" be best for the application described above?

Answers

June 16, 2011
John
These master cylinders are designed for the compact dimensions and various applications. They are not designed to be used in place of a stock master cylinder with a booster. There are several obstacles that cannot be overcome to make the use on a 4 wheel disc brake system with power brakes. What we suggest as a stock replacement with correct mounting would be either 91031422, 91031445, 91031440, or 91031446 master cylinders. They have sufficient volume in the reservoirs and for four wheel disc brakes you may opt for the 1 1/8” bore for less pedal travel. You will also need to verify the availability of sufficient vacuum of 18-20 inches to get full benefit from a power brake system.
1 answers

How can I determine if a master cylinder is a quick take up or not for low drag calipers? I am looking for a manual 4 disc quick take up master cylinder and can not find anything that says specifically if it is what I am looking for.

Jake
Bolingbrook, IL
May 03, 2015

How can I determine if a master cylinder is a quick take up or not for low drag calipers? I am looking for a manual 4 disc quick take up master cylinder and can not find anything that says specifically if it is what I am looking for.

Answers

May 08, 2015
Zach
Expert
These are not called a quick take up by wilwood, but we have used these several time with a 4 wheel disc setup and had great results.
Page 1 of 1

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