...aka "brake compensator", this one was used on Ferrari (275 or 330?) and also Miura, the bracket seems unique to Mangusta. Mr. Fiat sells a rubber cap ("Miura brake distribution valve rubber cap" over the end, I haven't looked yet for the spring clip. OKP sells a replacement assembly. http://www.miuraworkshop.com/tav25.html
Update Sept 2022; the compensator is being repro'd. even for less than 300 euro. Search Ebay for a Ferrari 250 or Miura regulator (REGOLATORE DI FRENATA, even Fiat 4321182). Expect the threads to NOT be British inch for at least the Fiat AR76 application.
Update Oct 2022; from the Miura website, showing pure metric fittings (but using the Girling ball ends on the lines).
The Pantera version is different, 01310a /b - VALVE ASSY PRESSURE CONTROL . There is a charity/business online that had some repair pieces for Pantera (for just $10, how is that not charity... https://www.musclecarresearch....a-prop-valve-autopsy ) but I have no idea if they work with the Goose piece. See also http://www.panteraplace.com/page199.htm
The clear PVC tubing to cushion the plumbing to the tabs is original.
