Originally Posted by takjak2

I have a 4 point cage and 6 point harnesses. The anti-submarine straps clip into eye bolts through the floor pan with nuts welded to backing plates. The waist strap on the outside clips in to an eye bolt that replaces the seat belt bolt. On the other side my Wedge Engineering seat brackets have a threaded bracket for the stock clasp to bolt into; eye bolt goes there. Everything is the same thread pitch.

I strongly suggest not running 4 points, or harnesses with the stock seats.