Just wanted to chime in as I got a set of these from Trackdecal for the rear of my 4Runner. I had removed the tow hitch a ways back to make room for an oversized spare so didn't have any hardware in the frame to use.
I can confirm that M12 bolts with a 1.25 thread pitch in lengths of 40mm and 50mm are the way to go. As I didn’t have hardware in my frame I had to hit all four holes with PB Blaster and a wire brush to clean things up, otherwise no bolts were going in.
The brackets themselves are a great and simple solution at a fair price. Would highly recommend these.
I can confirm that M12 bolts with a 1.25 thread pitch in lengths of 40mm and 50mm are the way to go. As I didn’t have hardware in my frame I had to hit all four holes with PB Blaster and a wire brush to clean things up, otherwise no bolts were going in.
The brackets themselves are a great and simple solution at a fair price. Would highly recommend these.