The shank that comes with the Fastway e2 Weight Distribution w/ 2-Point Sway Control - Trunnion - 6,000 lbs GTW, 600 lbs TW # FA92-00-0600 is indeed the 4100; it is the following part number:
- Fastway e2 Weight Distribution Shank - 12" Long - 6-1/2" Rise, 4" Drop - 1,200 lbs TW # FA92-02-4100 view full answer...