Quote:
Originally Posted by wiedemab
They are attached to a bar that is just below the clamp for the door bars.
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In the picture in the original post, that appears to be the case... but I didn't see any mention of harness attachments in the description on the webpage. However, in the webpage picture there appears to be harness tabs on the crossbar that is pushed all the way down near where the door bars clamp on.
Harness mounting specs vary by manufacturer, but usually the manufacturers want them anchored level (+/- a certain tolerance) with the harness passthrough provisions in the seatback, and I believe some sanctioning bodies specify their own requirements but I would hope they follow the testing and requirements set forth from the manufacturer. Some manufacturers such as Schroth have versions specifically for street cars that tie into the rear seat lap belt hardpoints (and have built in retractors), but using 4-point belts on a vehicle without rollover protection is another safety matter as well.
Here's a tech sheet regarding shoulder harness angle; they specify -5 to +30 degrees from the seat passthroughs for maximum effectiveness and to avoid spinal compression injury.
http://www.vickracing.us/technotes/SFI_Harness.pdf