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OEM 2-bolt aluminum master cylinders with plastic reservoir:

'95 Lebaron 7/8" bore**

'89 Dakota 15/16" bore**

'85 Diplomat (F-body) 1 1/32" bore*

'85 D-150 1 1/8" bore*

**Back of piston must be bored to accept manual brake push rod and retainer.

* Back of piston will accept manual brake push rod and retainer.

Rule of thumb:

1. Master cylinder piston size is relative to caliper piston size. Large caliper pistons require large MC piston.

2. All things equal, smaller bore master = higher line pressure and longer, softer pedal stroke.

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Thanks, I didnt know what size the different body
lines used

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That is why I use the big bore.If you use a lot of braided line the pedal will fill like a soft grapefruit.

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I use the braided for the whole set up and it has a
little softness but not much... not worth my changing it

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Just to clarify:
The 85 diplomat is a "M" body no??

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yes

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Just to clarify:
The 85 diplomat is a "M" body no??

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yes

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