Z51 Brake Calipers
Former Vendor
Joined: Aug 2005
Posts: 5,774
Likes: 0
From: Loganville GA
yes they are a direct bolt-on if you use the Z51 brackets. The pistons on the rears are slightly larger, but you won't notice a difference in day to day driving. The lettering on the front calipers is smaller on the C5 ones though.
Thread Starter
Pro
Joined: Jan 2005
Posts: 615
Likes: 2
From: Mill Creek WA
I thought the calipers were identical; I was mainly worried about capatability with the Z51 bracket and the large rotors. Are the front pistons the same? Do you know why the rear pistons are larger? Would that throw off the front-to-rear balance? This is important because these calipers (I'll use the DRM SS pistons in the front) will be used for HPDEs. Thanks.
Former Vendor
Joined: Aug 2005
Posts: 5,774
Likes: 0
From: Loganville GA
I thought the calipers were identical; I was mainly worried about capatability with the Z51 bracket and the large rotors. Are the front pistons the same? Do you know why the rear pistons are larger? Would that throw off the front-to-rear balance? This is important because these calipers (I'll use the DRM SS pistons in the front) will be used for HPDEs. Thanks.
Former Vendor
Joined: Aug 2005
Posts: 5,774
Likes: 0
From: Loganville GA
Thread Starter
Pro
Joined: Jan 2005
Posts: 615
Likes: 2
From: Mill Creek WA
Randy at DRM has posted that they offer a master cylinder with a brake bias system that is used to increase the rear braking performance relative to the front. It would seem that the larger pistons in the rear might be a good thing.
Race Director
Joined: Aug 2005
Posts: 13,592
Likes: 187
From: Hudson WI
NCM Sinkhole Donor
I happen to agree with you, but that being said, why would GM add another rear caliper part number if they didn't need to? Trust me when I say adding a part number at GM is a big deal.
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Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
I have someone that wants Z51 rotors installed on a conventionl C6, it appears that I need to order a set of caliper brackets for a Z51 in order to mount the front rotors in place. The rears rotors are a direct drop in fit is that correct?
Race Director
Joined: Aug 2005
Posts: 13,592
Likes: 187
From: Hudson WI
NCM Sinkhole Donor
You need front and rear brackets to go with the rotors. I think Gene at gmpartshouse.com has them on sale.
Le Mans Master
Joined: Jan 2003
Posts: 8,596
Likes: 19
From: Portland Oregon
Cool, thanks for the tip. I have a local dealer that I work with that supplies my shop with all our GMPD needs. We get GM parts for a little over what they pay so it works out cheaper than buying from Gene or from GM Parts Direct especially when you figure in their shipping costs.
Melting Slicks
Joined: Oct 2006
Posts: 2,228
Likes: 5
From: Gainesville Georgia
They are physically identical on the outside, but the piston is 42mm vs. 45mm on the C5 and standard C6. The front pistons are the same. I believe it has been written on here that the engineers did it for better brake feel, but I know many members have upgraded to the Z51 brackets and rotors without changing the rears. Not sure how many do HPDE's though. I myself am currently running the standard rear caliper with the larger piston and rear Z51 brackets/rotors, but I have front C6Z calipers and thought the larger piston might be better in the short time until I get my rear C6Z calipers in.
Instructor
Joined: Sep 2004
Posts: 239
Likes: 0
From: Jupiter FL
Using C5 Z06 calipers on a C6 Z51, what lines?
I just ordered a set (4) of C5 Z06 calipers for my C6 Z51. I want to put on Stainless braided brake lines while I'm at it. What lines will fit this combo?
Do I get stainless lines for a C6 Z51 or a C5 Z06? or are they the same?
Do I get stainless lines for a C6 Z51 or a C5 Z06? or are they the same?
Former Vendor
Joined: Aug 2005
Posts: 5,774
Likes: 0
From: Loganville GA
