Alternative to "custom hats" for 2 piece rotors
Thread Starter
Supreme Member

Joined: May 2002
Posts: 1,333
Likes: 1
From: Texas
Car: 1991 Z28 Convertible
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 3.23 with Eaton posi
Alternative to "custom hats" for 2 piece rotors
Just wondering if anyone had ever thought about using a drum brake hub from a 67-69 camaro for rotor hats. Shopping arounf they go for $25. Would save in time, hassle, and money if you could use these instead of trimming down a set of stockers for a 2-piece rotor setup.
What do you guys think? Cant remeber if this has come up before.
What do you guys think? Cant remeber if this has come up before.
Thread Starter
Supreme Member

Joined: May 2002
Posts: 1,333
Likes: 1
From: Texas
Car: 1991 Z28 Convertible
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 3.23 with Eaton posi
The hub on the left is the drum hub. I belive it has the same offset. I don't know what size bolts those are (7/16 or 12mm?). I thought that if you are working on a daily driver, at least you wouldn't have to buy junkyard rotors to turn down.
Senior Member
Joined: Dec 2001
Posts: 896
Likes: 1
From: Coquitlam, BC
Car: 86\92 Mutant
Engine: 355CI 430HP
Transmission: T-5 with mods
Axle/Gears: 7.625", Eaton Posi, 3.73
I thought of this using early Chevy\Olds\Pontaiac drum brake front hubs. You can find a 5x4.75" bolt circle if you go to things like a Nova or Acadian. Unfortunately I was unable to find a matching bearing combo that woul fit onto our spindles. The outer bearing is fine ( I believe . Might be vica versa...memory foggy ) but the ID of the inner bearing is too large to fit the spindle. I spent many hours going through bearing catalogs and physically measuring things to no avail. In the end it was much easier to simply machine down a set of used 1LE rotors.
Supreme Member

Joined: Aug 2001
Posts: 2,136
Likes: 2
From: Costal Alabama
Car: 1989 Iroc-Z
Engine: 350, ZZ4 equivalent
Transmission: Pro-Built Road Race 700R4
Axle/Gears: 3.23 Dana 44
I was looking into them when I was working on the C4 and LS1 swaps. I was unable to find their offset, bearing sizes, stud size, and stud pattern. So I just went with turning down thirdgen rotors. Also the turned down rotor seems more beefy and thicker then the 1’st gen hub.
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