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Wilwood Combination Remote Fill Master Cylinder Kit

SAME DAY SHIPPING! Most orders ship within 24 hours.

Specs
Material Type:
Aluminum
Sold in Quantity:
Each
Finish:
Natural
Thread Pitch:
5/16"-24
Outlet Fitting:
3/8"-24
Garage Sale:
No
Centerline of Holes:
2.25
Overall Width:
4.31
Mounted Length:
5.56
Bore Size:
-
Wilwood Combination Remote Fill Master Cylinder Kit

Click image to enlarge

Details

Reviews

Q & A

What's in the Box

Six different bore sizes and four different installation configurations are available in this master cylinder kit. Precision machined from high strength aluminum, this kit includes both small and large size reservoirs which can be mounted for more convenient service access. Standard mounting bolt hole configurations provide easy applications for racing and off road vehicles, specialty cars, recreation and industrial vehicles.

Bore sizes available include: 5/8", 3/4", 7/8", 13/16", 1", 1-1/8".

  • Includes small and large reservoirs which can be direct or remote mounted
  • Aluminum cylinder with plastic reservoir tank
  • Mounting flange is a vertical pattern on a 2-1/4" on center
  • Master cylinder has a single 3/8-24 brake line outlet
  • The two side mount holes are 3" from center to center

70174 Instructions (PDF)

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

Notes

Tech Tip: The bigger the master cylinder, the more fluid you get...But you'll have less pressure at the caliper.

Specs

  • .625" = 5/8"
  • .750" = 3/4"
  • .875" = 7/8"
  • .8125" = 13/16"
  • 1.00" = 1"
  • 1.125" = 1-1/8"

Customer Reviews

Rated 4.3 out of 5 by 10 reviewers.
RATING BREAKDOWN
10 reviews
5 Stars
6
4 Stars
2
3 Stars
1
2 Stars
1
1 Star
0
RECOMMEND THIS PRODUCT:

Knightrider 484
Verified Purchaser
Verified Reviewer
Avondale, La.

good product, poor installation

August 10, 2015
I liked the master cylinder. The hydraulic throwout bearing used -4 AN fittings, and the master cylinder had a -3AN fitting. I could not find an adapter to fit the master cylinder since it has a metric fitting. I only wish the master cylinder had a -4 AN fitting
Yes, I recommend this product.
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Racer111
Indiana, USA

Great product

February 25, 2013
Easy to install!!! Complete Kit!!!!! Very detailed instructions.
Yes, I recommend this product.
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knobby
Verified Purchaser
nc

can mount in many ways.

February 08, 2013
wildwood makes many good products,and speedway you can always count on,thanks.
Yes, I recommend this product.
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Kustom
Verified Purchaser
Kansas

Great Product!!!

December 07, 2010
Works good on my 1950 Chevy truck. The remote tanks helps in this application
Pros:
  • Complete kit
Yes, I recommend this product.
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jc
Verified Purchaser
western mass usa

Wildwood M.C.

December 04, 2010
i purchased this to use as a clutch master and for its remote resevoir.[...]. I ended up using a diff unit w/ 1 5/8" travel as this one only had 1 1/4" travel. The white plastic resevoirs looked cheap on my firewall is second reason I went back to origional unit.
Pros:
  • Hvy duty made well
Yes, I recommend this product.
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Larry
Verified Purchaser
Omaha, Ne

Nice product.

November 15, 2010
Well made with some options on how to mount. However it was too big for my frame (Lotus 7 replica)
Yes, I recommend this product.
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Mr. Fabulous
Detroit, MI

Solved my problem

November 10, 2010
The flexable design of this M/C really gives the installer a lot of options. It was perfect for the clutch on my roadster where I wanted to put the M/C under the floor. Great unit!
No, I would not recommend this product.
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ajb12b
terre haute in

GOOD DEAL

November 05, 2010
very good deal, many options and set ups avalible in this kit, easy to install and works great
Yes, I recommend this product.
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T.J.
Oklahoma

Great for mini sprints too

September 01, 2010
I would recommend it for mini sprints as well it is strong and can be mounted several different ways to save space.
Pros:
  • It has easy mounting
  • Great stopping power
  • Reliability
Yes, I recommend this product.
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Tom
Texas

Good product worked on my 66 fastback

March 12, 2010
Good product
Yes, I recommend this product.
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Page 1 of 1

Product Q&A

7 questions : 8 answers

1 answers

Can this master in 3/4 bore be used with the Speedway 7/8 clutch slave cylinder part #91025605? 302 Automatic converting to World Class T5 5spd

bad68ford
March 04, 2015

Can this master in 3/4 bore be used with the Speedway 7/8 clutch slave cylinder part #91025605? 302 Automatic converting to World Class T5 5spd

Answers

March 04, 2015
EricM
To get the full 1.2" of stroke from the slave cylinder 91025605 you would need a 7/8" bore master cylinder. If you do not need the full amount of stroke then the 3/4" bore master cylinder would make the clutch pedal easier to push.
1 answers

what size bore would I need for my micro sprint or how to mesure thr bore

piledriver
Sioux Falls, SD, USA
August 05, 2013

what size bore would I need for my micro sprint or how to mesure thr bore

Answers

August 06, 2013
Jason
If running a single brake Speedway offers part #8352605520 that is a 1/2" bore master cylinder. If running dual calipers a 5/8" bore would be recommended. The bore is the size cylinder and will determine how much fluid is moved when compressed. To measure you would need to take master cylinder appart.
2 answers

can this master cylinder be used with a power booster? to achieve power brakes?

December 30, 2011

can this master cylinder be used with a power booster? to achieve power brakes?

Answers

January 02, 2012
John
This master cylinder is not designed to work in conjunction with a brake booster. Several factors would need to be addressed including mounting pattern and the machining of a slug to convert the piston to a shallow dish instead of a deep bore. Wilwood does offer part number 8352608555 with conventional horizontal mounting pattern and can be used with manual or power brakes.
January 02, 2012
John
This master cylinder cannot be readily adapted to a power brake set up.
1 answers

Which bore size master cylinder should I use with your metric big bore calipers part # 91031040 ?

December 11, 2011

Which bore size master cylinder should I use with your metric big bore calipers part # 91031040 ?

Answers

December 13, 2011
John
Part number 70174 Master cylinder bore size for non boosted applications normally is limited to 1” bore with standard pedal ratios of 6 or 7 to 1. The greater the bore size the more pedal pressure required to obtain the same psi at the calipers. If there is greater pedal ratio available a 1 1/8” bore size may be used on 4 wheel disc applications. PSI at the calipers will need to be 1200-1300 in order to achieve satisfactory stopping power.
1 answers

Can this Master cylinder be mounted in a vertical position ? I need the pushrod to be pointing straight down like some are mounted on motorcycles. Can this be done ???

Bigred
Fairhope Al,
March 30, 2011

Can this Master cylinder be mounted in a vertical position ? I need the pushrod to be pointing straight down like some are mounted on motorcycles. Can this be done ???

Answers

April 04, 2011
Craig
That master cylinder was not designed to be mounted that way and would probably not work right in the vertical position. I would contact Wilwood and ask them if it would work properly when mounted vertically.
1 answers

Is this ok to use for a clutch application. If so which one. I am using it for a small block chev w saginaw 4 spd and 13 inch clutch.

November 26, 2011

Is this ok to use for a clutch application. If so which one. I am using it for a small block chev w saginaw 4 spd and 13 inch clutch.

Answers

November 30, 2011
John
Part # 70174 This master cylinder could be used for clutch applications and needs to be sized per the hydraulic throw out bearing or slave cylinder recommendations. We also offer part number 8352601304 which is ¾” bore and works with many hydraulic throw out bearings and some slave cylinders. In ¾ bore it would work fine with our throw out bearing number 91025610 and the necessary lines for your application.
1 answers

The rubber cap with the hole in the middle mounter on the top of the cylinder, does the tank mount on top of it or does the rubber go inside the tank

Norman
Avondale,La.
July 27, 2015

The rubber cap with the hole in the middle mounter on the top of the cylinder, does the tank mount on top of it or does the rubber go inside the tank

Answers

July 28, 2015
Zach
Expert
I believe you are asking about the cover that comes on these to keep debris out durring shipping. That black piece is to be removed and discarded. There is an o-ring on the master cylinder that seals the reservoir.
Page 1 of 1

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