Performance Pack 6-piston brakes question

[fonatig]

Hi everybody!
I'm collecting all the needed parts to swap my base 2018 Premium EB 2-piston brakes to 6-piston brakes from 2020 GT PP

I was lucky enough to get a nice set that included:
4 lower control arms
Front knuckles
Outer tie rod ends
Rotors
Calipers with pads and brake lines

Three things that were missing:
1. Master Cylinder + Booster from GT PP (Ordered. Seems to be recommended to replace)
2. Front control arm Air deflectors (Ordered from Steeda)
3. Dust shields

I checked what kind of dust shields I need and got kinda confused.
These 6-piston sets usually sold with smaller shields that basically only protect control arms ball joint rubber boots from heat.
But then I opened service manual for 2015 and saw that smaller dust shields only came with MT.
All others came with bigger shields that cover whole back side of the rotor.

I already bought smaller shields but I kinda don't like that they have no protection against cases when you go over a big puddle.
It can damage the rotors if they are hot.
But at the same time, will the air deflectors even be useful if I Install bigger shields?

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[Jaymar]

It's inside the wheel, anything that could hit the backside could also come around from the equally exposed front side. More telling, Ford produced thousands of them and put them on the streets with warranty coverage. If splashing them was a risk they would not have taken it.

 

[Corporate_Rebel]

I swapped the smaller dust shields onto my 301A GT while doing the swap from 4 piston to 6. Haven't encountered a problem with the smaller ones, did an auto x in the rain and didn't have a problem thus far.

 

[NightmareMoon]

Some GTs have the 6-piston brembos and then theres the Performance Pack, which IIRC is only for manual (or was for some years) and combines underbody ducts to route air to control arm mounted deflectors and the rotors past the smaller dust shields. Its a three part recipe.

If you’re not doing the PP bellypan and front valence which fits it, you probably dont need to worry about deflectors or the dust shields, because the air stream from the belly pan wont be there to deflect.

 

[fonatig]

Some GTs have the 6-piston brembos and then theres the Performance Pack, which IIRC is only for manual (or was for some years) and combines underbody ducts to route air to control arm mounted deflectors and the rotors past the smaller dust shields. Its a three part recipe.

If you’re not doing the PP bellypan and front valence which fits it, you probably dont need to worry about deflectors or the dust shields, because the air stream from the belly pan wont be there to deflect.

That's interesting! I didn't realize there was a special belly splash shield.
It also seems like I'll probably need different wheel well fender liners to fit different shape of belly shield.

 

[NightmareMoon]

That's interesting! I didn't realize there was a special belly splash shield.
It also seems like I'll probably need different wheel well fender liners to fit different shape of belly shield.

You're probably right about the wheel well liners, although a clever person could probably trim and modify your existing ones and get it to work. The belly pan (on the 15-17 cars) also fit the front lip differently, so a different front lip too.

All that work gets you the best brake cooling, but unless you're really beating on the car (like on a track) with repeated hard acceleration into hard braking, you probably aren't going to be overheating your brembos without the belly pan ducts/deflectors/heat shields on the street.

But yeah, you now see how it all works together.

 

[kz]

Hi everybody!
I'm collecting all the needed parts to swap my base 2018 Premium EB 2-piston brakes to 6-piston brakes from 2020 GT PP

The deflectors is anything you really need but - did you make sure your wheels will fit over the calipers ?

 

[sldghmr]

If you do the air deflectors, ditch the dust shields all together.

'15-'17 there was only a PP1 option. '18-up (maybe started in '19, I'm not 100%) there was a PP2 option in addition to the PP1. The under shield you have pictured above is the PP2 (larger air channels)...little more $$$ than the PP1, but you can offset the cost of it by cutting & trimming your own inner fender liners. If you want to go down the rabbit hole of buying fender lines, be forewarned...there are at least 3 different ones (GT, GT/PP1, GT/PP2).

 

[fonatig]

The deflectors is anything you really need but - did you make sure your wheels will fit over the calipers ?

I have a 2018 Premium. They came with 19" rims, which should be just the right size for these brakes.

If you do the air deflectors, ditch the dust shields all together.

'15-'17 there was only a PP1 option. '18-up (maybe started in '19, I'm not 100%) there was a PP2 option in addition to the PP1. The under shield you have pictured above is the PP2 (larger air channels)...little more $$$ than the PP1, but you can offset the cost of it by cutting & trimming your own inner fender liners. If you want to go down the rabbit hole of buying fender lines, be forewarned...there are at least 3 different ones (GT, GT/PP1, GT/PP2).

Yea, cutting the existing fender liners is the way to go. Seems to be done fairly easily.

So you say there's only PP2 trim on face-lifter Mustangs?

I found this usefull thread where they are upgrading GT PP to PP2.
They say "base model cars need a LOT more parts".
I have a "base" model with 2 piston brakes but at the same time that GT PP belly shield they posted looks just like mine.
Lip might be different tho, as it's GT.


I've spent an evening googling and trying to figure out what part numbers I need to have that belly shield with ducts and a lip that would fit it and, I'm honestly got even more confused now.

I might just have to find A 2018+ PP that being parted out and buy whatever set of parts I need.

 

[jpjr501]

Best mod I've done to my car was put 6-piston Brembo's on my car.

I had the Baer Big Brake kit all around, horrible. What a mess. Squeaky, smelly, noisy when hot but worst of all was the mess.

Found a dude on FB who wanted to do a swap (no money) and I am very happy now.

Before:

 

[EFI]

Best mod I've done to my car was put 6-piston Brembo's on my car.

I had the Baer Big Brake kit all around, horrible. What a mess. Squeaky, smelly, noisy when hot but worst of all was the mess.

Found a dude on FB who wanted to do a swap (no money) and I am very happy now.

Before:

They call that a "big" brake kit? Are you sure you didn't get the Baer drag brakes which are supposed to be tiny and save weight?

 

[jpjr501]

They call that a "big" brake kit? Are you sure you didn't get the Baer drag brakes which are supposed to be tiny and save weight?

This is what they call it:
Baer SS4+ Deep Stage 2.0 Front Big Brake Kit with 12-Inch Rotors; Fire Red Calipers

 

[sldghmr]

So you say there's only PP2 trim on face-lifter Mustangs?

Forgive me, but I am unfamiliar w/this term. Do you mean like Steeda or Roush Mustangs?

I've spent an evening googling and trying to figure out what part numbers I need to have that belly shield with ducts and a lip that would fit it and, I'm honestly got even more confused now.

yup...that's the rabbit hole that I ran into as well. Throw in the addition of coming from a '15 to mix and I'd have to throw in bumper, fenders, hood and lights to bolt on a PP2 under tray....UGH!

 

[EFI]

This is what they call it:

Those are specific for drag racing, hence the term "deep stage". The calipers, pads and rotors are tiny they're even smaller than the base EB/V6 brakes. They are designed that way to allow as small of a wheel as possible and to be as light as possible, knowing that most drag applications only need minimal braking performance and only need to do it once.

Good call on upgrading them. I would be skeptical to run those on the street, and downright terrified if I was doing any sort of performance driving that require multiple hard stops.

 

[jpjr501]

Those are specific for drag racing, hence the term "deep stage". The calipers, pads and rotors are tiny they're even smaller than the base EB/V6 brakes. They are designed that way to allow as small of a wheel as possible and to be as light as possible, knowing that most drag applications only need minimal braking performance and only need to do it once.

Good call on upgrading them. I would be skeptical to run those on the street, and downright terrified if I was doing any sort of performance driving that require multiple hard stops.

I know what they are and it's a weird name for something this small. They are absolutely horrible, they look horrible and leave a horrible mess. A 401a car with 800hp was not fun with these little brakes. I asked Baer if I could exchange to pads not so messy and they said, nope. Can't sell me pads less messy, streetable pads? Nope. I've had Brembo's on all 6 Mustang's so why was I dealing with this crap? Put out an FB ad, an hour later the free deal was done. Sooooooo....much better.

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