I have an 87 syncro westy, converted to Girling G60s front and Audi 5000 turbo rear. Much,much better than stock and I don't worry about overcooking the brakes now. Something I managed to do twice with the stock setup. It's still 5000 plus pounds and takes a while to stop but even with the really large amount of money it took probably the most worth while money I've spent. [including wheels, tires and probably some other stuff that I don't remember it was over $2000 for the conversion. Had it done. I don't know enough to do work that my life may depend on].

Don't know about GWs version.
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On Wed, 10/31/18, Mark McCulley <markmcculley@GMAIL.COM> wrote:

 Subject: GW Bigger Brakes
 To: vanagon@GERRY.VANAGON.COM
 Date: Wednesday, October 31, 2018, 5:35 AM

 Anyone have any experience with the latest
 version of the GoWesty Bigger
 Brakes? They went off the market for a
 while but are back, I think they
 needed to re-engineer some of the
 components.

 Are bigger brakes a worthwhile upgrade
 for a stock Westy with original
 engine? I have 16" wheels so that won't
 be an issue.

 -Mark
 '87 syncro Westy