10-01-2020, 05:54 AM
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#1
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Registered User
Join Date: Jul 2011
Location: Richmond, VA (The Fan)
Posts: 978
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Hard brake line size?
I need to make a custom brake line, anyone know the stock hard brake line size? I can’t find it anywhere
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1997 Boxster 4.2L Audi V8 Bi-Turbo
2003 911 C2
NASA HPDE Instructor
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10-01-2020, 07:23 AM
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#2
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1998 Boxster Silver/Red
Join Date: Sep 2017
Location: 92262
Posts: 3,074
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Quote:
Originally Posted by truegearhead
I need to make a custom brake line, anyone know the stock hard brake line size? I can’t find it anywhere
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I believe it is 3/16 inch. I stand corrected, but what I read (and I found nothing specific to the 986, instead the 911) leads me to believe that's the number.
You might contact some companies that sell hard brake lines and see if they can reference the actual number. 
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1998 Porsche Boxster
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10-01-2020, 11:21 AM
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#3
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On the slippery slope
Join Date: Mar 2014
Location: Austin and Palm Springs
Posts: 3,797
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Quote:
Originally Posted by Starter986
I believe it is 3/16 inch. I stand corrected, but what I read (and I found nothing specific to the 986, instead the 911) leads me to believe that's the number.
You might contact some companies that sell hard brake lines and see if they can reference the actual number. |
A 986 and 996 share the braking system. A couple of differences in calipers/disks depending on models and I think the GT3 uses a different master cylinder, but I believe the piping is the same
engine firewall forward they are pretty much the same cars
__________________
2004 Boxster S 6 speed - DRL relay hack, Polaris AutoTop DIY
2004 996 Targa Tip
Instructor - San Diego region
2014 Porsche Performance Driving School
2020 BMW X3, 2013 Ram 1500, 2016 Cmax, 2004 F-150 "Big Red"
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10-01-2020, 08:12 AM
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#4
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Registered User
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 6,584
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It is 3/16 or 4.75MM.
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“Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
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10-01-2020, 10:37 AM
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#5
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1998 Boxster Silver/Red
Join Date: Sep 2017
Location: 92262
Posts: 3,074
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Quote:
Originally Posted by JFP in PA
It is 3/16 or 4.75MM.
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OP.... there's your certain answer. 
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1998 Porsche Boxster
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10-01-2020, 11:23 AM
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#6
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On the slippery slope
Join Date: Mar 2014
Location: Austin and Palm Springs
Posts: 3,797
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Quote:
Originally Posted by JFP in PA
It is 3/16 or 4.75MM.
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as always, JFP for the win
__________________
2004 Boxster S 6 speed - DRL relay hack, Polaris AutoTop DIY
2004 996 Targa Tip
Instructor - San Diego region
2014 Porsche Performance Driving School
2020 BMW X3, 2013 Ram 1500, 2016 Cmax, 2004 F-150 "Big Red"
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10-02-2020, 11:35 PM
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#7
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Registered User
Join Date: Jul 2011
Location: Richmond, VA (The Fan)
Posts: 978
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Thanks guys!
__________________
1997 Boxster 4.2L Audi V8 Bi-Turbo
2003 911 C2
NASA HPDE Instructor
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