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Dual 7 Inch Brake Booster Master Cylinder Combo, 1 Inch Bore

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Specs
Material Type:
Steel
Sold in Quantity:
Kit
Outlet Fitting:
3/8"-24 (4)
Bolt Hole Pattern:
3.38" x 3.38"
Centerline of Holes:
3.38
Overall Length:
13.25
Outside Diameter:
7.00
Bore Size:
1.00
Dual 7 Inch Brake Booster Master Cylinder Combo, 1 Inch Bore

Click image to enlarge

Please note the following about this product:

  • This item is sold as a kit.

Details

Reviews (3)

Q & A (9)

What's in the Box

Info

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. 

Specs

  • Pushrod-to-mounting flange is 5-1/2"
  • Four bolts on 3-3/8" centers
  • 5" thick from master cylinder mount to firewall face
  • 4" long firewall mount face to end of pushrod
  • Pushrod stud is 3/8" fine thread
  • (4) qty 3/8"-24 outlet ports (2 plugs included)
  • 8" from mount to outer edge

Customer Reviews

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

steg
Verified Purchaser
coupeville wash.

brake booster fit just tine under the floor

April 28, 2016
went in a 1940 che truck look good
Yes, I recommend this product.
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david
Verified Purchaser
clarksville tn

nice

November 12, 2015
booster and masters cy kit works and fit well for my 1950 chev truck thanks to tec support for the help . plus new prop valve tec recomended makes the install look very clean .thanks for the help.
Yes, I recommend this product.
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Woodie
Verified Purchaser
Newbury Park, Ca

I would buy this product again

April 20, 2012
Delivery was rapid.
Pros:
  • Easy To Install
Yes, I recommend this product.
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Was this review helpful? 0 0

Page 1 of 1

Product Q&A

9 questions : 9 answers

1 answers

Is there supposed to be a gasket or o-ring between the Master Cylinder and the Booster? The booster has a rubber "nipple", but I believe this is supposed to be discarded. Is there a gasket or o-ring between the Master Cylinder and Power Booster that I'm missing? There weren't any instructions and I just want to make sure I do this correctly the first time. Thanks.

CoreyGray
Ft. Worth, TX
March 02, 2015

Is there supposed to be a gasket or o-ring between the Master Cylinder and the Booster? The booster has a rubber "nipple", but I believe this is supposed to be discarded. Is there a gasket or o-ring between the Master Cylinder and Power Booster that I'm missing? There weren't any instructions and I just want to make sure I do this correctly the first time. Thanks.

Answers

March 03, 2015
EricM
No there is not any gasket needed between the booster and the master cylinder. Simply bolt them together.
1 answers

What application would I use for a 57' Plymouth Belvedere? 4 dr ht power steering

lehu
Grass Lake Charter Township, MI, USA
August 24, 2014

What application would I use for a 57' Plymouth Belvedere? 4 dr ht power steering

Answers

August 26, 2014
EricM
With the weight of a 57 Plymouth Belvedere a dual diaphragm in 7" or 8” with the 8" providing greater assistance with suggested vacuum of 18-20 inches. On the master cylinder the 1” bore is recommended unless you have 4 wheel disc. If you have sufficient vacuum the 1 1/8” bore master will supply more volume with less pedal travel but also requiring more pedal pressure.
1 answers

Can you use this with 4 wheel disc brakes?

Pickupman
May 15, 2014

Can you use this with 4 wheel disc brakes?

Answers

May 16, 2014
Travisp
Yes, this would be suitable for four wheel disc brakes.
1 answers

LOOKING TO INSTALL ON FIRE WALL OF 1950 CHEV,setting on a 1973 El Camino chassis,need to know length of brake rod going thru fire wall.

Deluxe 1950
Chickasha Okla.
December 21, 2011

LOOKING TO INSTALL ON FIRE WALL OF 1950 CHEV,setting on a 1973 El Camino chassis,need to know length of brake rod going thru fire wall.

Answers

December 22, 2011
Jason
4" from firewall mount face to the end of the pushrod.
1 answers

I was wondering if you had a diagram for this kit for a drum/drum brake application and what components are necessary to install this kit on a 1951 chevy truck. Also kit is for a frame mount under cab application.

scooter
canada
June 20, 2011

I was wondering if you had a diagram for this kit for a drum/drum brake application and what components are necessary to install this kit on a 1951 chevy truck. Also kit is for a frame mount under cab application.

Answers

June 23, 2011
John
This dual booster/master cylinder combination is the answer to achieving modern braking on the early Chevy pickups. For a drum/drum application the 1” bore master cylinder is the correct one to use. We also offer the bolt on pedal assembly for the 47-54 Chevy pickups to make upgrading your brakes a simple process. You will need to have sufficient vacuum available in the 18-20 inch pounds as recommended by the manufacturers of power brake components to get the full power assist. Also remember the larger reservoir on the master cylinder goes to the front brakes and you will need to use an adjustable proportioning valve in the line to the rear to eliminate premature rear wheel lockup during panic braking. Sorry, we do not have a diagram available
1 answers

Lets go over this one more time in hopes of clearing up once and for all. On the master cylinder #910-31445 there are several conflicting answers about which fitting goes to front brakes. On the master I was sent the largest reservoir , which most always goes to front brakes , is farthest from mount holes. Could you please take the time to look into this one more time . Thank you

B
Vancouver, WA
July 16, 2015

Lets go over this one more time in hopes of clearing up once and for all. On the master cylinder #910-31445 there are several conflicting answers about which fitting goes to front brakes. On the master I was sent the largest reservoir , which most always goes to front brakes , is farthest from mount holes. Could you please take the time to look into this one more time . Thank you

Answers

July 17, 2015
Eric
Expert
To be honest it makes absolutely no difference which port goes to which brakes on this master cylinder. The size of the piston on both ports are the same which makes this possible. We typically recommend connecting the port closest to the mount flange to the front brakes just for the simple fact that most master cylinders are connected in that manner, however in reality it makes no difference. Sorry for the confusion.
1 answers

I have a 1964 Ford F100. I received the disc brake kit yesterday, 91031913. Will this booster and master cylinder work with the disc brake kit I listed above? I see some different kits, dual vs single, 7inch vs 8inch and bore size, which one will fit 91031913. I will have disc up front and drum in back. Thank you.

Alonso
Glendale, AZ
July 18, 2015

I have a 1964 Ford F100. I received the disc brake kit yesterday, 91031913. Will this booster and master cylinder work with the disc brake kit I listed above? I see some different kits, dual vs single, 7inch vs 8inch and bore size, which one will fit 91031913. I will have disc up front and drum in back. Thank you.

Answers

July 20, 2015
Eric
Expert
Yes this dual diaphragm 7" booster and 1" bore master cylinder will work fine with your brake kit. For a better assist I do recommend the largest dual diaphragm booster that will fit in the space you have available. The 8" dual booster and 1" master cylinder 91031413 would be my choice as long as you have the room to fit it.
1 answers

I have a 1936 Plymouth 4 door sedan. It has a 318 Plymouth motor ,disc brakes in front drum in rear in it .Will this part work for me.Thank you

wilber
industry,pa.15052
August 13, 2015

I have a 1936 Plymouth 4 door sedan. It has a 318 Plymouth motor ,disc brakes in front drum in rear in it .Will this part work for me.Thank you

Answers

August 14, 2015
Wayne
Expert
Yes this dual diaphragm 7" booster and 1" bore master cylinder should work fine for your brakes. For a better assist you might consider a larger dual diaphragm booster if it will fit in the space you have available. The 8" dual booster and 1" master cylinder 91031413 would be a good choice as long as you have the room to fit it.
1 answers

I have a 65 Tempest/GTO clone that I'm building and may run 2 or wheel disc.It appears this will work with 2 or 4wheel options,i'm just curious if this may be adaptable to my 65 A-Body firewall mount?

DeWayne
Bristol, Va
January 27, 2016

I have a 65 Tempest/GTO clone that I'm building and may run 2 or wheel disc.It appears this will work with 2 or 4wheel options,i'm just curious if this may be adaptable to my 65 A-Body firewall mount?

Answers

January 28, 2016
Zach
Expert
We offer p/n 910-31978 which is meant for 64-72 Chevelles, so I think it would be workable for your GTO
Page 1 of 1

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