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Old Oct 5, 2017 | 09:11 AM
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Default Drilled rotors

I just purchased a used 2015 3LT stingray and it has slotted and drilled rotors, just wondering if they bare stock or after market? I see all the talk about drilled rotors not being reliable due to cracking around the holes and just wondered if that was true why would GM accept the liability for them.
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Old Oct 5, 2017 | 09:48 AM
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Z51 option has that style of rotors.

Are the tires 19" front and 20" rear? That's another clue you have a Z51, Also, look under the hood for the dry sump tank located at the passenger's side firewall. Should see a yellow dip stick. All Z51 have the dry sump tank.

If you don't have the tires and dry sump, then its a base car and those are not stock rotors.

Last edited by RussM05; Oct 5, 2017 at 09:50 AM.
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Old Oct 5, 2017 | 10:20 AM
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Originally Posted by RussM05
Z51 option has that style of rotors.

Are the tires 19" front and 20" rear? That's another clue you have a Z51, Also, look under the hood for the dry sump tank located at the passenger's side firewall. Should see a yellow dip stick. All Z51 have the dry sump tank.

If you don't have the tires and dry sump, then its a base car and those are not stock rotors.
Z51 rotors are slotted but not drilled. These sound like after market rotors. I doubt they would be warrantied, but check with the dealer.
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Old Oct 5, 2017 | 10:50 AM
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Default Rotors

Originally Posted by tyho
Z51 rotors are slotted but not drilled. These sound like after market rotors. I doubt they would be warrantied, but check with the dealer.
Not a Z51 but has NPP and only had 8K miles on it when I purchased it. Is there an option brake package for the 3lt that might be on it. Got car from a Lexas dealer and they only called it a3lt had no idea about NPP or what it was.Thanks
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Old Oct 5, 2017 | 03:33 PM
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Originally Posted by trawler
Not a Z51 but has NPP and only had 8K miles on it when I purchased it. Is there an option brake package for the 3lt that might be on it. Got car from a Lexas dealer and they only called it a3lt had no idea about NPP or what it was.Thanks

Non z51 cars have the option of adding the NPP. The 3lt package is a trim level package and has nothing to do with the brake rotors. Sounds like the original owner changed the rotors.
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Old Oct 5, 2017 | 05:00 PM
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Originally Posted by tyho
Z51 rotors are slotted but not drilled. These sound like after market rotors. I doubt they would be warrantied, but check with the dealer.
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Old Oct 5, 2017 | 05:59 PM
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Default Rotors

Originally Posted by Maxpowers
OK I got it they have to be something he added in short time he owned the car. Going to do an upgrade and dump these things.
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Old Oct 10, 2017 | 03:30 PM
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Originally Posted by trawler
OK I got it they have to be something he added in short time he owned the car. Going to do an upgrade and dump these things.
GM didn't deliver drilled rotors on any version of the C7. Drilled rotors on the street aren't a problem so you don't have to hurry swapping them out. If you plan on doing any track events you will want to get rid of them.

Bill
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Old Oct 10, 2017 | 03:35 PM
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I've never seen drilled rotors on a race car.

That's the clue.

\db2
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Old Oct 10, 2017 | 04:21 PM
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Originally Posted by dbaker


I've never seen drilled rotors on a race car.

That's the clue.

\db2
at least not with iron rotors.
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Old Oct 15, 2017 | 02:15 PM
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More than not the drilled one's r wildwood.
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Old Oct 19, 2017 | 02:53 AM
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Originally Posted by robert miller
More than not the drilled one's r wildwood.
Hard to say. Wilwood also makes slotted rotors for people who run their car on track. Wilwood's current C7 Z06 offering comes with a choice of rotors if you know where to look. You can get everything from a ceramic rotor to drilled/slotted. Here is a slotted rotor that can be ordered instead of the drilled/slotted rotor picture in the kit:
http://www.wilwood.com/Rotors/RotorP...emno=160-13806


Bill
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Old Oct 19, 2017 | 09:13 AM
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Originally Posted by Bill Dearborn
Hard to say. Wilwood also makes slotted rotors for people who run their car on track. Wilwood's current C7 Z06 offering comes with a choice of rotors if you know where to look. You can get everything from a ceramic rotor to drilled/slotted. Here is a slotted rotor that can be ordered instead of the drilled/slotted rotor picture in the kit:
http://www.wilwood.com/Rotors/RotorP...emno=160-13806


Bill
But on one vendors are some place the drilled ones was cheaper someplace. I saw it the same day I posted my above post.. Robert
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Old Oct 19, 2017 | 01:57 PM
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Default Rotors

Originally Posted by robert miller
But on one vendors are some place the drilled ones was cheaper someplace. I saw it the same day I posted my above post.. Robert
No more guessing, they are made by Power Stop, work great and low to no dust.
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