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

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Specs
Centerline of Holes:
3.38
Material Type:
Steel
Overall Length:
13.25
Sold in Quantity:
Kit
Outside Diameter:
7.00
Bore Size:
1.00
Outlet Fitting:
3/8"-24 (4)
Bolt Hole Pattern:
3.38" x 3.38"
Garage Sale:
No
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

Q & A

What's in the Box

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

Woodie
Verified Purchaser
Newbury Park, Ca
Product Rating

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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Page 1 of 1
91031411

Product Q&A

5 questions : 5 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
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