So I scored a pair of knuckles from 90 civic ex auto.
Now I bought the brake booster from the same car but something wrong with the booster.

Now I looked up the 91 Civic EX Sedan booster its the same part number as the regular si booster. Now when I looked up the Auto EX Sedan booster its whole different part number.

So I am confused, looks like the auto booster on the EX sedan is bigger but the manual tranny booster is smaller..

some clear this up for me I have been going to autozone and kragen, napa.

The part number for the manual tranny sedan ex booster is 535412

the auto sedan ex booster number is 535437

 

Since nobody answered my question I am going to put this info for the people who might be interested and searches when they are stuck.

I have this 90-91 ex master cylinder and using the A1 Cardone Part Number: 53-5432 Booster.
I am using this master cylinder from 90-91 ex 0728573.


Booster Fits all Cars Below\Detailed Applications

Year


Make


Model


Engine

1989-1986


Acura


Integra


All
Application Data:

1989-1988


Honda


Accord


All
Application Data: w/FI

1992-1992


Honda


Civic


All
Application Data: Hatchback Exc. SI w/A.T.

1992-1992


Honda


Civic


All
Application Data: Hatchback SI w/A.T.

1992-1992


Honda


Civic


All
Application Data: Sedan DX,LX

1989-1989


Honda


Civic


All
Application Data: 4WD w/A.T.

1993-1993


Honda


Civic Del Sol


All
Application Data: S w/A.T. To Chassis #PS00335

1993-1993


Honda


Civic Del Sol


All
Application Data: SI To Chassis #PS003689

1991-1988


Honda


Prelude


All
Application Data:

1987-1985


Honda


Prelude


All
Application Data: w/FI

 

feel free to thank me when ur done.