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C8 Z06 J56 Caliper part numbers

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Old Mar 17, 2023 | 11:53 AM
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Originally Posted by c5racr1
why not just put a 3-4mm spacer?
The clearance issue is to the barrel, not the spokes. I don't really understand why it's tighter than C7 Z06 front brakes, since they're likely same caliper, but perhaps the mounting location is a bit different. Anyway, this might even be an issue specific to BC Forged (unlikely), or perhaps the measurements were too conservative (more likely); we'll soon see as more customers get their Z06 cars. One more note, the Z06 rear brakes did not clear 18" wheels at all with their 380 mm rotors, and required 19"wheels.
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Old Mar 17, 2023 | 12:30 PM
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Do they have part numbers for the red calipers as opposed to black
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Old Mar 18, 2023 | 07:26 AM
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Originally Posted by X25
Update: I ended up canceling my order for the parts, since BC Forged NA mentioned the brakes would be within 1 mm to the front wheel barrel (18" RZ39), and that's a bit too close.
So since it was a barrel clearance issue, should be no issue for a stingray with 19,20" fronts?
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Old Mar 18, 2023 | 09:16 AM
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19/20 should be fine. 18s will work with a different barrel.
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Old Mar 18, 2023 | 11:17 AM
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Originally Posted by c5racr1
19/20 should be fine. 18s will work with a different barrel.
+1, as long as spokes are not on the way, 19"/20" would definitely work.
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Old May 2, 2023 | 11:11 AM
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We had a pretty good conversation about this exact subject in a previous thread...https://www.corvetteforum.com/forums...post1605805647

I just came back from a Nurburgring track day this past weekend and I'm still on the fence of what to do next. I'm currently on Girodisk rotors front and rear, RBF600, Carbotech xp12's and this year Cup 2's in stock sizes on MRR z06 replica wheels. The cup 2's are like magic, I was carrying much more speed through the corners than last year and getting on the gas sooner and never had the rearend step out.

My xp12's are getting low and while I didn't experience fade or shudder, there were some weird and hard to explain moments where the brake just didn't seem to hook on the first push but then it would catch and feel normal. I found that three laps on the Nordschleife was my personal limit with how I use the brakes. I'm not saying there's anything wrong with my hardware set-up...I just don't have full confidence in it and want something that will simply remove brakes from my train of thought. Last year it was tires, Cup 2's have fixed that, just wondering what that answer is in the form of brakes.

I'll be running SPA in June, probably on a fresh set of pads, not sure which ones yet so I'll report back on my experiences after that. Nordschleife is a completely different animal than a normal track and I know from driving with other folks that my braking technique is probably not ideal there but I'm still learning it.
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Old May 2, 2023 | 12:00 PM
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Do you have any suspension modifications?

Originally Posted by metomwhhou
We had a pretty good conversation about this exact subject in a previous thread...https://www.corvetteforum.com/forums...post1605805647

I just came back from a Nurburgring track day this past weekend and I'm still on the fence of what to do next. I'm currently on Girodisk rotors front and rear, RBF600, Carbotech xp12's and this year Cup 2's in stock sizes on MRR z06 replica wheels. The cup 2's are like magic, I was carrying much more speed through the corners than last year and getting on the gas sooner and never had the rearend step out.

My xp12's are getting low and while I didn't experience fade or shudder, there were some weird and hard to explain moments where the brake just didn't seem to hook on the first push but then it would catch and feel normal. I found that three laps on the Nordschleife was my personal limit with how I use the brakes. I'm not saying there's anything wrong with my hardware set-up...I just don't have full confidence in it and want something that will simply remove brakes from my train of thought. Last year it was tires, Cup 2's have fixed that, just wondering what that answer is in the form of brakes.

I'll be running SPA in June, probably on a fresh set of pads, not sure which ones yet so I'll report back on my experiences after that. Nordschleife is a completely different animal than a normal track and I know from driving with other folks that my braking technique is probably not ideal there but I'm still learning it.
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Old May 3, 2023 | 06:13 AM
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Originally Posted by Drew888
Do you have any suspension modifications?
No hardware changes from stock but I am running a hybrid track/street alignment, basically about half as aggressive as GM recommends.
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Old May 9, 2023 | 02:09 AM
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Originally Posted by X25
Many companies like Girodisc, etc. are also coming up with their 2-piece rotors for OEM fitment. exciting tests ahead : )

many?
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Old May 9, 2023 | 03:05 AM
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Originally Posted by rajeevx7
many?
I bet DBA and RB would also have rings for OEM rotors in time..
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Old Jun 1, 2023 | 04:52 PM
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Can anyone confirm these as the part number for z06 iron setup Torch Red front caliper

Driver: 85636352
Passenger: 85636355
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Old Jun 2, 2023 | 01:20 PM
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I just took delivery of my new Z06. Unfortunately it doesn't have the carbon ceramic brake option which I would like to have. I'm considering selling my brand new take offs, edge red calipers and buying the CCB. Would anyone be interested in working out a deal?

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Old Jun 2, 2023 | 03:29 PM
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Originally Posted by 69 Vette
I just took delivery of my new Z06. Unfortunately it doesn't have the carbon ceramic brake option which I would like to have. I'm considering selling my brand new take offs, edge red calipers and buying the CCB. Would anyone be interested in working out a deal?
Sent you a message
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Old Jun 23, 2023 | 09:44 AM
  #34  
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Originally Posted by metomwhhou
We had a pretty good conversation about this exact subject in a previous thread...https://www.corvetteforum.com/forums...post1605805647


I'll be running SPA in June, probably on a fresh set of pads, not sure which ones yet so I'll report back on my experiences after that. Nordschleife is a completely different animal than a normal track and I know from driving with other folks that my braking technique is probably not ideal there but I'm still learning it.
We have three cars on hawk dtc60’s and have been very happy with them. Heavy bite, decent wear. One car without rear brake ducting cracked an after market solid rotor. One other car (fastest of the group) hairline fractured the OEM fronts. Keep going until a larger crack appears.
Final two cars have AP/Brembo bbk front and rear. No complaints there, but the factory z51 with hawk dtc are very competitive time wise. Even better during a session at Homestead.


Another note loosely related here : one of our cars is a brake upgraded to z51 take offs from an AP car. Everything fit except the ebrake. Had to use a grinder and take 3/16” of aluminum off the inside-back surface to clear the z51 rotor.
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Old Jul 21, 2023 | 04:02 PM
  #35  
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Is anybody ordering this yet?

what is the complete set of part numbers for bright red full 4 corner setup everything needed?

No issues with our master cylinder vs Z06? Don’t we have 4 piston vs their 6?
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Old Oct 30, 2023 | 05:10 PM
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Thought I'd add my $.02 as I've been looking into Z06 J56 brakes as well as Z51 brakes as my car is a no-option, plain jane with the peasant brakes.

Found this site to be the best to find part numbers with specifications and fitment guides,, prices there are a different story LOL.

Shop GM Parts - GM Genuine Parts & ACDelco

I'm looking at the bright red calipers as car is Artic White, these are the number and prices I've found but no promises on anything. Keep in mind prices vary from the different online dealers and who knows if any of this is available with the strike.

Front Calipers
Driver 85636352 J56 J6F Price 450-480
Pass. 85636355 J56 J6F Price 450-480

Rear Calipers
Driver 85621103 J56 J6F Price 320
Pass. 85621104 J56 J6F Price 320

So Calipers are roughly $1600. Which is just about the same (+-$100) as new Z51 calipers based on Rock Auto prices.

Rotors are the killer so to speak as compared to a Z51 setup.
Front 84041944 Price 500 x 2 I guess these aren't directional as only saw a single part number.
Rear 86822032 Price 520 x 2
With 4 rotors you're looking at about $2100, Z51 new OEM's from Rock Auto about $690. For an extra $1K ($3K total) you can get the Girodisk setup for the Z06 which might be something to think about.

Carbotech 1521 street pads $550

calipers $1600
Rotors $2100
Pads $550
Total $4250

There'd be some incidentals, pin kits, Z06 front hoses (maybe), I'd guess $200 more. Anyone know if SS lines are generally available?

So somewhere around $4500 for both ends. Roughly $5500 with the Girodisk setup.


A new Z51 setup would be $2800ish new (plus incidentals) and if you swapped the front with Girodisk, you'd be somewhere around $3600 give or take. A sidebar is you can buy the Z51 calipers and rotors used for $1500-$1700 via car-parts.com and there are a ton available. So with new pads and Girodisk front rotors you'd be somewhere around $3K.



One thing, these prices don't address the e-brake. Best guess for Z06 solution is around $1K, Z51 about 1/2 of that. Used Z51 parts are available but expensive. Frankly I never used the e-brake in my manual C7 so I'd never use it on the C8.


Here's a few more part number of the rear calipers.

Driver
85621099 Blk
85621101 Yellow J56
85621103 Red J56
85621105 Red Edge 6JN
85621107 Dark Gray
85621109 Yellow J57
85621111 Orange
85621113 Red J57

Passenger
85621100 Blk
85621102 yellow
85621104 red J56
85621106 red edge
85621108 Dark gray J57
85621110 yellow J57
85621112 orange j57
85621114 red j57
85621115 red edge J57



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Old Nov 24, 2023 | 07:13 PM
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OK,,, took the plunge, front and rears. Just shy of $3800 without hoses, pads and fluid. I'm praying the part number are correct LOL. As a sidebar, do I need two pin kits per side? Only ordered one. These should be J56 (base Z06) brakes in Torch Red. I opted for OEM rotors to keep costs down for now. Also note, I priced out parts at a dozen GM Online Parts Houses. I started with just the 4 rotors and shipping, the difference in prices was up to $500 ($2101-$2606). It would of been a lot more with the added parts. I ended up going with GMPartsOutlet.Net. It pays to shop. I still believe I'll be right around $4500 all in. Also note I haven't addressed e-brake yet.


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Old Nov 24, 2023 | 08:17 PM
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Are you planning on using the e brake? That is different also.
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Old Nov 24, 2023 | 08:55 PM
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Originally Posted by c5racr1
Are you planning on using the e brake? That is different also.
Good question. It's real flat here, so the e-brake rarely gets used. That said, I do want it but the notion of buying a whole new Z06 setup leaves a bit to be desired as it's a giant waste of money. I know a company has made a bracket to retrofit with a big brake kit (Brembo??) although pricy for no apparent reason. Need to look into a bracket of some sorts first.
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Old Nov 24, 2023 | 08:58 PM
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Only $1800 LOL!

Parking Brake Relocation Bracket for the 2020+ C8 Corvette w/ Brembo GT BBK sold by Motoroso | Motoroso


Z06 e-brake caliper are $800ish.

Last edited by gtpvette; Nov 24, 2023 at 09:05 PM.
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