G60 Brake Interchange

Phil Rose pjrose at frontiernet.net
Wed May 15 11:11:55 EDT 2002

At 9:18 AM -0400 5/15/02, Kneale Brownson wrote:
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>Thanks, Scott.  So what can I look at on my 200q20v that someone
>converted to G60's prior to my ownership to determine what I could
>use to improve brake performance?  It looks like the important part
>would be the carrier???  Should I find a number on it that will
>confirm which type of conversion was done (ie., did they install S4
>G60's or 5Ktq G60's).  If I have the S4 version, can I upgrade
>simply or am I looking at more thousands?  What about reinstalling

There should be a number stamped on the rotor. The correct p/n for
the S4/(and post-91 V8) type rotor is 441 615 301A. The older
(shallow hub) version is 301**B**. If there's no number on your
rotor, you need to make a measurement of hat depth. As I recall, the
difference in hat depth is small (perhaps no more than 10mm?)


>At 08:18 AM 05/15/2002 -0400, QSHIPQ at aol.com wrote:
>>G60 calipers themselves are all interchangeable.  The hub depth is
>>increased on the 200tq/v8/S4-6 cars, and some differences in where
>>the flex line attaches at the caliper (it's to a bracket with a
>>hard line on the later cars, to the caliper directly on the early
>>cars), and the flex line itself is a different length.
>>As of the 91 200/90 v8 the "deep" hub G60 carrier and rotor were
>>installed.  These components are NOT interchangeable back (updating
>>is not possible to older cars), but I suppose could be interchanged
>>forward (the why question comes to mind tho, and wheel fitment
>>issues could be a problem).
>>To use a 5ktq (early) G60 setup on a 91 200> G60 car, the only part
>>you can use is the caliper and the pad.  Plus you would need the
>>following parts:  Brake line, hard line and bracket at the caliper,
>>deep hub carrier, and deep hub rotor.
>>Scott Justusson
>>QSHIPQ Performance Tuning
>>In a message dated 5/14/02 4:59:36 PM Central Daylight Time,
>>pjrose at frontiernet.net writes:
>>At 3:36 PM -0400 5/14/02, Kneale Brownson wrote:
>>>What distinguishes the 10vt G60's from the S4 G60's used in dealer
>>>conversions from UFO's?  My 200q20v was brake-eunuched with G60's before it
>>>fell into my hands.
>>AFAIK, the only significant difference is in the depth of the hub,
>>therefor the rotor hat depth you'll need. The S4 hub is slightly
>>deeper than 10V. Only way I know to tell is remove wheel and measure
>>hub (housing) depth. It's my understanding that most (all?) UFO-G60
>>conversions done at dealers under warranty were with S4 struts. There
>>could be exceptions I suppose. Sorry I can't recall the numbers (mm)


Phil Rose
Rochester, NY
mailto:pjrose at frontiernet.net

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