HELP with brake caliper pistons from Pelican

[nippy]

Sorry guy I think I put this in the wrong place.



Hey guys Im rebuilding my 1982 911SC brake calipers. I have the "A" type front calipers.

So I purchased four front calipers from Pelican and 3 showed up the same and 1 different. See images. My question is did Porsche do a redesign at some time or is this a mistake?

The 3 look like early "S" aluminum style caliper pistons with the solid centers and a "button" like center.The one looks like the pistons in my current calipers, it has a hollowed out center.

So I called Pelican to resend and check their parts bins as all are marked in individual packaging with the same part # SIC-351-425-00.

So I now need 3 and they only send 2, and again its the wrong ones, or is it? When you look at the line item on Pelican and look at the images, the last 2 images show the "S" type looking pistons under the correct part #. So I'm confused. I will say they are the right size but they look different.

https://www.pelicanparts.com/More_Info/SIC35142500.htm?pn=SIC-351-425-00&SVSVSI=798

[nippy]

Sorry here is the image the bottom right is the type I need.

[Cory M]

I've rebuilt several sets and the stock pistons all looked like the one in the lower right corner. Maybe the part number superseded to a new design?

[Quicksilver]

I"d expect them to look like the lower right too. But I'd check with Bill Verburg and see if they have been superseded or if it is a variation of some sort.

I'd still prefer the piston to be as light as possible and for it to have a big air gap between the pads and the back of the piston.

[Bill Verburg]

Originally Posted by nippy

Sorry here is the image the bottom right is the type I need.

All the ones iv'e seen are like the lower right

It probably doesn't make a difference, that's the pad face( if anti squeal spyders were used you would need the hollow on that side) as long as the working face and seals are the same.