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gt3 master brake cylinder

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Old Jan 26, 2016 | 11:55 PM
  #31  
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I have no idea if the 981 even needs it? On my 987 it's awesome!
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Old Jan 27, 2016 | 11:59 AM
  #32  
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Originally Posted by Schmidts Cat
I have no idea if the 981 even needs it? On my 987 it's awesome!
I think it does. On my almost 3 yr old 981 S the pedal is 'mushy' and travel is too long for my liking. I've flushed/bleed them a number times but that doesn't improve the feel. Braking performance is fine (w/ fresh Endless pads) fine but pedal feel just isn't up to my liking.
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Old Jan 28, 2016 | 09:36 AM
  #33  
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Thanks AP99.. Picked up my new Spyder yesterday! I'll have to see how I feel about that pedal.
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Old Jan 28, 2016 | 09:43 AM
  #34  
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I am tracking the car...completely stock next weekend. I will report back as well. The pedal feels much firmer than my 987 Spyder.
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Old Jan 29, 2016 | 05:23 PM
  #35  
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2 friends did this - made a HUGE diference
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Old Jan 29, 2016 | 08:02 PM
  #36  
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Originally Posted by Craig - RennStore.com
2 friends did this - made a HUGE diference
Hey Craig,

Is it possible for you to get the part number of the master cylinder they used? The 2014 GT3 has a couple of versions of that part. With and without a integrated brake light switch.

Thanks . . .
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Old Apr 7, 2025 | 04:26 PM
  #37  
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What is the part no. for the proper GT3 MC for a 987.2 Cayman S? I have seen several numbers. Pelican and FCP tell you 997-355-910-31 or TRW PMN 166) doesn't fit the 987.2
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Old Apr 7, 2025 | 04:45 PM
  #38  
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The parts diagram shows 997-355-910-30 as used on the 2007-2011 GT3 and certain versions of the 997.2. It is a drop-in replacement on the 987.2. From searching it appears 997-355-910-30 has been universally replaced by 997-355-910-31, so that's what you'd want to order.

The vendors will tell you it won't fit because the 987.2 is not listed as one of the applications. But it'll fit fine, it just has a larger bore as used on the GT3 and also on 997 cars with PCCB.

It's a worthwhile upgrade in my experience and fixes the somewhat mushy stock brake feel on a 987.2
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  #39  
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This is what was on the box of the one I put in my car. It works great.
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