From: Ed Ruiz [eds928gt@yahoo.com]
Sent: Thursday, October 11, 2001 7:33 AM
To: 928
Subject: [928] Re: GTS brakes on S4....Is it compatible with 1 another?

I did the swap early last year.  Here's what will be required.

The rear S4 and GTS calipers are the same.  No need to swap them.

The front GTS calipers, rotors, pads, and rear stone shield are larger
than the S4 counterparts.  Fortunately, everything bolts in the same as
the S4.

A common misconception is: the GTS calipers require 17" wheels.  The
general answer is "yes", but there are some 16" wheels that will fit over
GTS calipers.  (I think most OEM flatdish 16" wheels will fit over the GTS
caliper.  BTW, 16" wheels with RDK sensors will not clear the GTS
calipers.  BTDT.)  However, if cooling around the rotor is important to
you (as it should be) then 17" wheels (or larger) should be used.  YMMV.

~ Merry motoring ~



From: mike monson [mmonsons@pacbell.net]
Sent: Thursday, October 11, 2001 9:35 AM
To: 928
Subject: [928] RE: GTS brakes on S4....Is it compatible with 1 another?

Andrew,

As others have noted the GTS brake upgrade is pretty straightforward.  I
just wanted to add, stock S4 wheels will not fit over GTS brakes.

Mike Monson
88 S4 w/ Big Reds and CupTwo style wheels
http://members.rennlist.com/mm928/