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where to bolt harnesses to?


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You need to bolt the 2 side straps to bolt eyes on the seat. The rear should go to a harness bar, but some people tend to bolt them to the rear seatbelt mounting holes. It's not ideal because its at the wrong angle.


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The passenger right and drivers left can be bolted to the chassis between the seats, or onto the subframes. I think that's how my standard seats were.



In the rear, they should ideally go onto a roll bar as part of a roll cage, or into the C pillar seat belt hole, but they need to be as straight as possible.


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Mine are 3 point so it goes into one belt at the back but its off centre using the old anchorages, what is a harness bar ?

Roll cage type bar that goes behind the seats, which the harnesses mount to.

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Edited by Arnold
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The big issue with fixing harnesses to rear seat belt points is that in a front end crash, you risk badly damaging your spine because you, the seat and the harness can/do pivot forwards & down (think what would happen if a flimsy fibreglass seat back snapped!).
MSA (Blue Book, Part K) say that the rear harness straps are prefered at an angle of +/- 10 degrees from horizontal, down to a max of 45 degrees. So your car would be unlikely to pass scrutineering if you mount to the rear seat belt points anyway, and you won't get to a nice shallow angle without a harness bar.
A poorly fitted harness will be a lot more damaging than a standard seatbelt!

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The belts ideally should be as straight as possible. Strut braces and C pillar braces aren't as strong as roll bars so in the event of a crash, the belts may not support you. Same as if the harnesses aren't straight, you can get spinal compression from being pulled downwards. A roll bar / cage is the best option.



I bought buckets with the intent on fitting 4 points but was advised against it without a cage. If you fit a cage and don't have a helmet then that can kill you as well! Tough one really.

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