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Brakes 5 lug disc conversion

  • Thread starter Thread starter opihinalu
  • Start date Start date Aug 30, 2022
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    brakes fox foxbody

opihinalu

Active Member
Feb 10, 2021
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Florida
Aug 30, 2022
#1
  • Aug 30, 2022
  • #1
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?
 

General karthief

wonder how much it would cost to ship you a pair
5 Year Member
Aug 25, 2016
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polk county florida
Aug 30, 2022
#2
  • Aug 30, 2022
  • #2

Brakes - The Ultimate 4-lug/5-lug Brake Conversion/upgrade Thread

Starting this thread with the hopes of reducing the number of 5-lug or general brake upgrade threads that have been appearing on the forums since most of the major brake conversion sites have gone down. This thread will be strictly informational, and any off-topic banter or user specific...
stangnet.com
 

Noobz347

Stangnet Facilities Maint Tech... Er... Janitor
Admin Dude
Jan 4, 1985
42,929
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Box behind Walmart
Aug 30, 2022
#3
  • Aug 30, 2022
  • #3
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

That is…until I whipped out my Bissell
Mod Dude
Feb 18, 2001
43,176
17,878
224
Massachusetts
Aug 31, 2022
#4
  • Aug 31, 2022
  • #4
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
 
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