Items are stocked in our warehouses based on regional demand. If an item is not in stock at a local warehouse, additional charges may apply. u - WARNING Cancer Causing See www.P65Warnings.ca.gov v - WARNING Reproductive Harm w - WARNING Cancer and Reproductive Harm 52 Towing/Hitches & Accessories SwayPro™ Weight Distributing Underslung Noise-free sway prevention never stops working, even in rain or snow. Trailers with a coupler welded underneath the frame will need to replace the standard hitch head with the BXW4076 Underslung Hitch Head. Spring bars augment the suspensions of the tow vehicle & trailer. Gross Towing Weight 20K maximum, 2” receiver. Rotating latches with clamp-on brackets for quick and easy setup. For Trailers with CouplersWelded to the Bottomof the Trailer Frame Underslung Kits Mfg # Features BXW0353 7-Hole Shank Underslung Hitch Head 350lbs. Tongue Weight BXW0553 7-Hole Shank Underslung Hitch Head 550lbs. Tongue Weight BXW0753 7-Hole Shank Underslung Hitch Head 750lbs. Tongue Weight BXW1003 7-Hole Shank Underslung Hitch Head 1000lbs. Tongue Weight BXW1503 7-Hole Shank Underslung Hitch Head 1500lbs. Tongue Weight Mfg # Description BXW4076 SwayPro Underslung Hitch Head SwayPro Underslung Hitch Head Standard Tongue Weights Available: 350, 550, 750, 1000, 1500.