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Old 08-13-2013, 01:58 PM   #5
thstone
Certified Boxster Addict
 
Join Date: Nov 2010
Location: Los Angeles
Posts: 7,669
Most dual use street/track cars have both sets of seat belts installed - use the 3 pt on the street and the 6 pt on the track. If needed, create a blank clip to insert into the 3-pt latch to stop the binging of the seatbelt monitor when using the 6-pt.

No reason to use the GT-3 belts, consider a standard Schroth HANS 6 pt harness like the Profi III for ~$400 ea. (http://www.schrothracing.com/competition/profi/profi-III). This still isn't particulary cheap.

Unfortuately, the only easy place to attach the harness behind the seats in a stock Boxster is the horizontal portion of the roll hoop. This may not be perfect in terms of harness-shoulder alignment but its the only option available and is commonly used in Boxster BSX cars (dual street/track use).

The Brey-Krause rollbar extension mounts above the stock roll hoops so it will not help at all with a better harness attachement point. Creating a custom harness mount that has improved harness-shoulder geometry is up to you.
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1999 996 C2 - sold - bought back - sold for more
1997 Spec Boxster BSR #254
1979 911 SC
POC Licensed DE/TT Instructor

Last edited by thstone; 08-13-2013 at 07:05 PM.
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