Master Cylinder and Booster Combos

MANUAL BRAKES TECH NOTE: Generally a 1" bore master cylinder is best with manual brakes. Manual brake master cylinders have a smaller piston bore diameter to maintain sufficient fluid pressure in the braking system. They also have a deeper hole for the brake pedal pushrod.

TECH NOTE: You can use a manual brake cylinder on a power brake system, but not vice-versa. The power brake cylinder's larger piston bore cannot supply the required level of hydraulic pressure required by manual brakes.

POWER DISC/DISC TECH NOTE: Generally it is best to use the the 1 1/8" bore when using power assisted disc/disc brakes with larger aftermarket brake calipers. For OEM disc/disc brake applications, the 1 1/8" bore is usually the way to go.

POWER DISC/DRUM TECH NOTE: Generally it is best to use the 1" bore for power disc/drum applications.

TECH NOTE: Use a deep hole model for manual brakes and a shallow hole model for power brakes.

TECH NOTE: Dual diaphragm boosters will provide easier pedal pressure over single diaphragm models.

TECH NOTE: The above information is a general guide. With custom brake applications many variations can be used. Call us if you have a question as to which is best for your application.


Tuff Stuff  2121NA-1 chrome 7" single diaphragm brake booster and master cylinder combo
Tuff Stuff 2122NA chrome dual diaphragm booster master cylinder combo
Tuff Stuff 2122NA-1 chrome 7" dual diaphragm booster master cylinder combo
Tuff Stuff 2121NA-1

7" Dia-3/8" Ports

Single Diaphragm

Disc/Drum-Drum-Drum

Chrome Plated

Master Cylinder & Brake Booster Combo$256.97
Tuff Stuff 2122NA

7" Dia-9/16" & 1/2" Ports

Dual Diaghragm

Disc/Disc

Chrome Plated

Brake Booster & Master Cylinder Combo$289.97
Tuff Stuff 2122NA-1

7" Dia-3/8" Ports

Dual Diaphragm

Disc-Drum

Chrome Plated

Brake Booster & Master Cylinder Combo$289.97
Tuff Stuff 2122NA-2 chrome 7" dual diaphragm brake booster & master cylinder combo
Tuff Stuff 2123NA chrome 8" dual diaphragm brake booster master cylinder
Tuff Stuff 2123NA-2 chrome 8" dual diaphragm brake booster & master cylinder combo
Tuff Stuff 2122NA-2

7" Dia-91/16" & 1/2" Ports

Dual Diaphragm

Disc/Drum

Chrome Plated

Master Cylinder-Brake Booster Combo$289.97
Tuff Stuff 2123NA

8" Dia-9/16" & 1/2" Ports

Dual Diaphragm

Disc/Disc

Chrome Plated

Brake Booster/Master Cylinder Combo$289.97
Tuff Stuff 2123NA-2

8" Dia-9/16" & 1/2" Ports

Dual Diaphragm

Disc-Drum

Chrome Plated

Brake Booster & Master Cylinder combo$299.97
tuff Stuff 4750 brake booster extension rod and clevis kit
1973-1993 Chevy GMC Truck Chrome Master Cylinder Brake Booster
Tuff Stuff 4750

Universal Kit

Brake Booster Rod Extension$39.97
1973-1993 GM Truck

Chrome Plated

Brake Booster & Master Cylinder Combo$319.97

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