"S" Calipers central pin removal ??

Hi All,
I'm just about to rebuild a set of Ali 911 "S" calipers I had lying around.
They had previously (by A Another) stripped blasted and honed.
Unfortunately they had obviously been left in dubious position as all the pistons are damaged by rust,
I have tried to buy replacements but that appears impossible or impractical.
A good friend has supplied some new replacement pistons but without the provision to inset the leakback valve.
the manufacturing company of the pistons, very reputable and professional, suggested cutting of the central pin in the cantilevers to allow the pistons to be fitted.

YOUR THOUGHTS PLEASE GUYS.

Cheers

Ian

This pistons are almost always rusted due to galvanic corrosion. PMB Performance has everything you need, and may be worthwhile having then remanufacture for you. While some racing S calipers had no pins, there is no real need to remove them. PMB has a couple of piston options that will not require pin removal.
https://www.pmbperformance.com/lwb-e...11-brakes.html
https://www.pmbperformance.com/diy-c...ts--acces.html

The knockback pins were "state of the art" but are now optional. There are numerous supporters of both their presence and absence.
If you are still actively racing, these pistons might be of interest.

Attachment 524484

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Originally Posted by JimmyT

The knockback pins were "state of the art" but are now optional. There are numerous supporters of both their presence and absence.
If you are still actively racing, these pistons might be of interest.
Attachment 524484

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Hi Jimmy

Very interesting design of the piston on the right. Does it need to be "clocked" and can it be used with the Knock back devices? I'm assuming these are made from titanium?

Regards

Jim

Yes, they are titanium with DLC coating. It has the provisions for the 'knock-back' device but can also be used without it. It still needs to be clocked during installation. You can see the top surface depression below:
Attachment 524576