[carguy55]

Ken at KNS was talking about doing a 2 piece rear floating rotor but cost for the pair for was like 1K. The other issue on the rear of the SS anyway has a full diameter splash shield that would need to be cut down to the minimum and still protect vital parts, similar to the SS track kit for the front.

[carguy55]

These pictures show the rear of a C7 Grandsport 2 piece rotors and rear duct cooling. We could use these rotors on the SS but the hat is not the right size. (Bottom picture is rotating 180 no matter what I do)

[RUQWIKR]

The J6M rear SS 1LE rotor is 340mm and the J56 C7Z / GS steel rear is 365mm with 12mm stud holes with a steel 2-piece hat. That rotor is the same OD as the one-piece Gen 6 ZL1 J6H rear rotor.

[TheRealJA105]

Originally Posted by carguy55

Ken at KNS was talking about doing a 2 piece rear floating rotor but cost for the pair for was like 1K. The other issue on the rear of the SS anyway has a full diameter splash shield that would need to be cut down to the minimum and still protect vital parts, similar to the SS track kit for the front.

Mine are already cut everywhere that there isn't a suspension bushing.

Originally Posted by RUQWIKR

The J6M rear SS 1LE rotor is 340mm and the J56 C7Z / GS steel rear is 365mm with 12mm stud holes with a steel 2-piece hat. That rotor is the same OD as the one-piece Gen 6 ZL1 J6H rear rotor.

The ZL1 rear rotors have the venting from the inside correct?

[TrackClub]

All brakes will get hot, by design. But ive never heard of rear calipers going "Brownbos" no matter what pad, suggesting cooling is not an issue per se. Personally, I'd rather spend $ on different components.

Now, if i ran 24hr enduros, i may think differently

[RUQWIKR]

Originally Posted by TheRealJA105

Mine are already cut everywhere that there isn't a suspension bushing.


The ZL1 rear rotors are have the venting from the inside correct?

The ZL1 rear rotor, like SS 1LE, are one-piece vented with drum-in-hat e-brake.

[TheRealJA105]

Originally Posted by RUQWIKR

The ZL1 rear rotor, like SS 1LE, are one-piece vented with drum-in-hat e-brake.

Right, but from looking at pictures it seems the venting comes from the inboard side not the outboard side like the SS.
https://www.rockauto.com/en/moreinfo...444557&jsn=991

[h018871]

Air does flow from the rear of the rotor
If you wanted to open up the slots in the dust shield as shown in carguy55's photo, perhaps more cooling. I haven't heat cracked a rear rotor, yet. To paraphrase TrackClub, if it ain't broke don't fix it

[JT Camaro]

Originally Posted by RUQWIKR

The J6M rear SS 1LE rotor is 340mm and the J56 C7Z / GS steel rear is 365mm with 12mm stud holes with a steel 2-piece hat. That rotor is the same OD as the one-piece Gen 6 ZL1 J6H rear rotor.

so it might be a direct bolt on for a zl1? Or still different hat?

[RUQWIKR]

Originally Posted by JT Camaro

so it might be a direct bolt on for a zl1? Or still different hat?

Bolt pattern is 5x120.65 on the Vette vs. 5x120, 70.7mm center bore vs. 67.4, etc., it's 2mm thinner ring, hat is different, and so on. About the only thing that is common is the ring OD. Anything can be made to work, I suppose.

[carguy55]

Parties over, Track club has arrived

[JTRATX]

Originally Posted by RUQWIKR

I think the PN is actually 19207043.

So is that part # for the SS 1LE?

[RUQWIKR]

Originally Posted by JTRATX

So is that part # for the SS 1LE?

If you are looking for vented pistons that will work, the J56 C7Z steel front brake vented pistons (23242510) should work in the J6M SS 1LE front caliper as those caliper bodies are the same.

[GunMetalGrey]

Originally Posted by RUQWIKR

I think the PN is actually 19207043. Buddy (Geoff) pointed it out to me. The pic they have for the other PN is for the vented ones, too. I will try to go correct my post. Sorry about that. Should not be an issue with returns at least for Amazon.

Updated: dug through my stash: opened the box to confirm: pic is right side up on my phone, but you can see the vented pistons and pressure seals in the sealed container.

So it turns out that these vented pistons do not come with boots!

So far my mechanics only been able to find separate dust boots and seals sold by Racing Brake for $200 per front caliper!

Does anyone know where I can find piston dust boots for a better price than that?

Or is my best bet to return what I bought and just order the complete racing brake kit which has vented pistons and dust Boots and seals for $250 each side?