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Since 1952

Wilwood Universal Master Cylinder Rebuild Kits

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Includes snap ring, internal spring, piston, primary seal, and secondary seal.
Wilwood Universal Master Cylinder Rebuild Kits

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Q & A

What's in the Box

These rebuild kits fit Wilwood and Tilton universal master cylinders. Available bore sizes include: 5/8", 3/4", 7/8", 1", and 1-1/8".

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

Customer Reviews

Rated 5 out of 5 by 2 reviewers.
2 reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star

Verified Purchaser
Hayward, CA, USA

parts were perfect

October 27, 2012
The rebuild kit contained everything necessary to rebuild my willwood racing master cylinder in my Dwarf car. It works perfectly.
Yes, I recommend this product.
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Verified Purchaser
Essex, mo

Works great, easy to install

July 10, 2012
Clutch pedal for son race car
Yes, I recommend this product.
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Product Q&A

2 questions : 2 answers

1 answers

Kit 220085 will it fit a 2001 polaris sportsman 500 atv

Dallas, TX, USA
June 20, 2014

Kit 220085 will it fit a 2001 polaris sportsman 500 atv


June 20, 2014
No this will not fit a Polaris ATV. Sorry I do not offer a kit for your application.
1 answers

Do the kits include a dust cover?

June 03, 2015

Do the kits include a dust cover?


June 04, 2015
Yes this kit includes a dust boot which covers the end of the master cylinder where the pushrod protrudes through. It is shown in the photo but with the angle it's sitting at it's tough to distinguish what it is.
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Heres how it works: A tank containing new hydraulic fluid is connected to the fluid reservoir on your vehicle and pressurized with air from a hand pump (pressure gauge ensures that the hydraulic system is not damaged due to excessive pressure). When one of the bleed valves on the vehicle is opened, old hydraulic fluid is expelled as new fluid from the tank is forced into the system.
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Item Details

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

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