Brakes 5 lug disc conversion

opihinalu

Active Member
Feb 10, 2021
180
19
28
Florida
Hey all. I am in the middle of a suspension refresh and I feel like now would be a good time to put discs on the rear as well. There is a guy near me selling a 5 lug disc 4.10 rear end. Besides that, what kind of parts do I need? Also I have read that you need a new master cylinder, why is that?
 
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Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
Admin Dude
Jan 4, 1985
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Box behind Walmart
My current favorite is the Cadillac ATS swap.

I think it is the -

GM ATS/XTS Brembo caliper 42mm x4 piston
-2771mm^2 for each caliper
-5542mm^2 for both fronts


from the thread karthief listed above.
 

Mustang5L5

Put lubricant all over the balls
Mod Dude
Feb 18, 2001
39,725
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Massachusetts
You need the new master cylinder because the addition of two calipers in the rear requires additional fluid volume requring a larger bore master cylinder.

You’ll also need booster, combo valve 3-2 conversion parts and provisions for the parking brake