Originally Posted by Al_Alguire
Many of the dragster builders have been using a lower X link on the four link for years and years. There are a few variations on the same principle. Also seem to recall someone advertising an X link 4 link lower in the back of National Dragster way way back.

Is R2B2 even around anymore?
I believe they are no longer in business but a chassis shop in Sac fabs them.