Stan Wilder wrote:

I can't say what the testing factor is on seatbelt strength but I will
tell you this.

Any company manufacturing and selling wire rope and nylon slings (used
for lifting steel etc.) can test a set of used belts for you. They have
the pulling equipment to test up to 40 thousand pounds.

So I suggest that you just opt for a used set and have them tested. If
they fail the test then you're only out a few bucks.

83 Westfaila Aircooled