Funny, I actually did this for the first time last week on my Of Road Buggy. For some reason traditional bleeding wouldn't work. You get a large syringe full of brake fluid and force it through the calipers, forcing air and fluid out the MC.
I would do the traditional bleeding method first as we all know this works on our 928's.
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1981 Porsche 928 "Euro" Auto Gunsmoke Metallic Flat - Black Interior
1983 Porsche 928S "US" Auto Light Bronze (Copper) Metallic - Brown Interior **SOLD**