Single piston disc brakes on ‘67 Firebird

[STREETFIGHTER50]

Can y’all tell me what brakes these are on this ‘67 Firebird? I see they’re only single piston. Aftermarket or conversion from a newer car??
https://i.vgy.me/WHVOG4.jpeg
https://i.vgy.me/89YK51.jpeg
https://i.vgy.me/K36K89.jpeg
https://i.vgy.me/kqfDoF.jpeg

[caddy507]

Looks like a typical GM setup, variations of part numbers based on bolt width (mount) and disc width.
Run on GM cars and trucks for decades.
https://www.summitracing.com/parts/ssb-a123-1/
They work fine, lots of upgrades of course if you need them. Easy to service. Replacements available everywhere, used a lot in circletrack racing so there are tons of pad choices.

[caddy507]

The general term for this style is GM Metric brakes, the rears are similar and were used on a lot of Cadillacs, looking at the parking mechanism. I assume they were used on more but if you search, Cadillac rear calipers, these will come up.

[a67]

The fronts appear to be the D52 (huge piston) caliper/brakes that GM came out with in '69. I swapped a set onto my '67 from a '69 GTO. Everything just bolted right up. Including the spindle.

The originals had a hat and a separate rotor. When it came time for new rotors they came as a one piece hat/rotor assembly. Like those in the pictures.

Bob.

[STREETFIGHTER50]

Thanks for the info! Guess they’re ok for single pots.

[caddy507]

They are fine, you can get lighter single pots for sure or wilwood makes a two pot D52, single side. but you might as well save for for a four piston set+ instead of stopping half way.

[STREETFIGHTER50]

Thanks for the info folks!��