Help needed,
Does any one know if the 21 mm master cylinder (non boosted )
is still available? If it is, where?

Thank you!

 

They did come as oem for part of 1 year, but they haven't been available for decades.

The only currently available choices are 19.05, 23.8 or a custom dual master cylinder set up.

Periodically even knowledgable people claim to have found an intermediate m/c but in every case the lead has turned out to be false. If you find differently let us all know.

 

Bill,

Thanks for the info.

 

If my memory serves, Mercedes has a 21 or 23 that is made by ATE and is about 1/3 the price of the P part. I do have one in my box of stuff somewhere , brand new, if anyone needs a part number. It will require some slight rebending of the brake lines if i remember.

andy

 

The ATE 23.8mm m/c # 3.2123-1003.3 was used on some MB trucks. It is available form several places(Rennsport systems for one) as a kit which includes a couple of adapters for the feeds and a longer actuation rod. The Ate/MB will only fit if an al. cross member is used. Yes, the feed lines and pressure lines will need a little relocation, as does the mechanical stoplight switch on the older cars.