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1958-64 Chevy Full-size Car Brake Booster Combo, Disc/Drum

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Specs
Material Type:
Steel
Sold in Quantity:
Each
Bolt Hole Pattern:
3.38" x 3.38"
Overall Diameter:
8.00
Mounted Length:
13.25
Bore Size:
1.00
1958-64 Chevy Full-size Car Brake Booster Combo, Disc/Drum

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Details

Reviews (1)

Q & A (8)

What's in the Box

Info

When you put modern disc brakes on the front of your 1958-1964 Chevy full-size car (Bel-Air, Biscayne, Impala), you should update the master cylinder as well. Stock 4-wheel drum master cylinders do not have the capacity to supply the proper amount of pressure for front disc brakes. For best results, we recommend using this simple, bolt-on master cylinder booster kit on all front disc brake conversions.

  • 8" dual diaphragm booster
  • 1" bore master cylinder
  • GM style proportioning/metering combination valve
  • Master cylinder has outlets on both sides for ease of plumbing
  • Includes plugs for unused outlets on opposite side of master cylinder

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

Specs

  • Outlet Fittings:  1/2"-20 and 9/16"-18
  • Proportioning valve comes with 1/8” NPT to 3/8"-24 IFF adapter fittings

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:

Ronde
Verified Purchaser
Wichita Falls, TX, USA

great

March 04, 2014
Easy to instill. Thank y'all guy and lady's for the help and great product.hope we can do more business together again.
Yes, I recommend this product.
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Product Q&A

8 questions : 8 answers

1 answers

Will this kit fit a 58 impala with 454

Jackhorsey
Blanchard, OK, USA
February 24, 2015

Will this kit fit a 58 impala with 454

Answers

February 24, 2015
EricM
Yes this kit will fit your '58 Impala but clearance to the 454 engine is unknown. The booster included in this kit is 8" diameter so you may want to take some measurements for clearance to the engine.
1 answers

Can this kit be purchased with a dual 7" diaphragm booster instead of a dual 8"? 1964 Impala with an LS swap. 8" diaphragms interfere with the rear coil pack.

JeffDonovan08
Delaware
December 19, 2014

Can this kit be purchased with a dual 7" diaphragm booster instead of a dual 8"? 1964 Impala with an LS swap. 8" diaphragms interfere with the rear coil pack.

Answers

December 20, 2014
EricM
Sorry this kit is only offered with the 8" booster.
1 answers

my proportioning valve is like the 58-64 type rather than the 55-57 model belair. did you sernd me the wrong one, or will it work?

57law
February 22, 2014

my proportioning valve is like the 58-64 type rather than the 55-57 model belair. did you sernd me the wrong one, or will it work?

Answers

February 25, 2014
EricM
We apologize for any confusion but the proportioning vale used in kit number 91035864 is a front disc and rear drum application valve and not meant to be a direct original replacement for the 55-57. It is the only one offered with the fitting configuration and will work correctly along with the booster and master cylinder in the kit.
1 answers

Will this kit also fit a drum/drum car and be able to use the proportioning valve?

Bobbyr
Texas
January 06, 2014

Will this kit also fit a drum/drum car and be able to use the proportioning valve?

Answers

January 06, 2014
EricM
No for a drum front and rear application use kit number 91031974. It can be used for disc front and rear or drum front and rear applications.
1 answers

1948 chevy coupe my 1948 chevy coupe has a 1973 nova front clip so the car has disc brakes will this master cylinder kit work with a stock nova system.

1948chevy
ga
June 23, 2013

1948 chevy coupe my 1948 chevy coupe has a 1973 nova front clip so the car has disc brakes will this master cylinder kit work with a stock nova system.

Answers

June 25, 2013
Jason
Booster combo number 91035864 has brackets in the kit for mounting the assembly to the firewall on the 1958-64 Chevy car. If you want the assembly on the firewall it will take some modification but could be made to work. If you prefer to have it under the floor like the original and there is clearance from the Nova sub you may want to consider part number 91031959 and a booster master combo number 91031411 and an adjustable proportioning valve number 91031353.
1 answers

Attachment of booster to pedal assembly In the pictures and description it appears that the new booster mounts to the firewall and a longer pushrod is used to the stock manual brake pedal. I noticed that you also offer PN 91031982 that adds a mechanical advantage to the booster bracket. Which of these options is a better choice when valve cover clearance isn't an issue? It also seems as if this kit angles the booster and master up instead of keeping them perpendicular to the firewall. Am I correct in that assumption? Thanks, Andrew Vehicle: 1962 Impala w/ stock manual drum/drum being converted with your disc front kit PN 91031911

lowrollin70gmc
Fargo, ND
May 18, 2013

Attachment of booster to pedal assembly In the pictures and description it appears that the new booster mounts to the firewall and a longer pushrod is used to the stock manual brake pedal. I noticed that you also offer PN 91031982 that adds a mechanical advantage to the booster bracket. Which of these options is a better choice when valve cover clearance isn't an issue? It also seems as if this kit angles the booster and master up instead of keeping them perpendicular to the firewall. Am I correct in that assumption? Thanks, Andrew Vehicle: 1962 Impala w/ stock manual drum/drum being converted with your disc front kit PN 91031911

Answers

May 20, 2013
Jason
Booster kit number 91035864 comes with the mount brackets to the firewall and it does angle the booster and master up slightly for additional valve cover clearance. With 18-20 inches of vacuum the brakes will be more sensitive and require less pedal travel. Normally part number 91031982 is not needed unless dictated by personal preference.
1 answers

Im installing this unit on a 1960 chevy impala with your disc brake kit up front and stock drums out back, does the proportioning valve that comes in this kit have a built in 10lbs residual valve for the rear drum brakes? the master cylinder is a basically a copy of a early 70s corvette which had 4 wheel disc brakes, the 4 wheel disc brake master cylinder did not have a residual built in. from my understanding a 10lbs residual valve is needed for the rear drums to function properly.

titus
stillwater mn
June 05, 2015

Im installing this unit on a 1960 chevy impala with your disc brake kit up front and stock drums out back, does the proportioning valve that comes in this kit have a built in 10lbs residual valve for the rear drum brakes? the master cylinder is a basically a copy of a early 70s corvette which had 4 wheel disc brakes, the 4 wheel disc brake master cylinder did not have a residual built in. from my understanding a 10lbs residual valve is needed for the rear drums to function properly.

Answers

June 08, 2015
Ken
Expert
The proportioning valve in this Kit does not incorporate a residual pressure valve. If you are using this in conjunction with drum brakes I strongly recommend adding a 10 lb. residual valve in the drum brake circuit (such as our 91031347). It would not be a bad idea to also put a 2 lb. Residual Valve in the disc brake circuit, but the 10 lb. valve in the drum circuit is a must-do.
1 answers

I purchased this kit from speedway and it did not come with any instructions. I need the plumbing instructions for the master cylinder and for the proportioning valve. The mounting was self explanatory. Does the front or rear reservoir go to the front discs or rear drums? Which outlet on the proportioning valve goes where? Can you send me instructions? Thank You

Mud
Reelsville IN
October 01, 2015

I purchased this kit from speedway and it did not come with any instructions. I need the plumbing instructions for the master cylinder and for the proportioning valve. The mounting was self explanatory. Does the front or rear reservoir go to the front discs or rear drums? Which outlet on the proportioning valve goes where? Can you send me instructions? Thank You

Answers

October 02, 2015
John
Expert
The reservoir on master cylinder in kit number 91035864 has the larger reservoir towards the front or furthest from the mount flange and this goes to the front brakes. The proportioning valve in the kit is number 91031351 and the instruction sheet for it is available here: http://static.speedwaymotors.com/pdf/910-31351%20MBM%20prop%20valve.pdf
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