This is a 4 link assembly used to help install a 2005+ Super Duty front axle under your 1967 to 1979 F series pickup in applications with oem used SD coils or slight lift coils. It consists of a pair of frame mouned brackets, 3/8" wall 1.75" OD DOM tubes, Rock Krawler brand rod ends, and hardware. This is an extremely heavy duty and well made kit. The upper tubes are formed into an "S" shape to wrap around the outside of the frame, and the lower tubes sit just below the frame to give excellent ground clearance.
 
This does NOT include the rest of the components necessary for the swap. For example, no spring buckets, track bar bracket, steering components, or other parts are included. The front end kits I offer have an upgrade ot 4 link for an additional $1,400.00. This listing here is beneficial for customers who have already purchased my front end kit and want to get rid of radius arms, or for customers who want to make their own spring buckets and other parts. If your goal is to but a complete kit, go to the front end converison kit lists, and select the option to add 4 link. 
 
Pictures and information here:
 
battlebornbrakes.com/4-link-gallery
 
And a video of this in action here:
 
https://www.youtube.com/watch?v=G2cu5KAQV6k
 
 
These tubes are machined on either end- the rod link end has 1.25" threads, NOT welded on threaded ends, then the other end has the outside diameter cut down for the last .25" so that the "C" shape pieces perfectly locate and sit over the tubes. The tubes and "C" pieces get welded together, then a cone shape steel piece slides over top and is welded to the tube and "C" piece, greatly adding to it's strength. The tubes are 3/8" wall and this assembly weighs more than the radius arms. The rod ends are Rock Kralwer part numbers RK04821 and RK05068. These are well made greasable rod ends. While they should last a lifetime, they are fully serviceable and in a worst case scenario replaceable.
 
Please know that 4 link takes more time and is a little more tricky to set up than a standard radius arm. It is very doable and you don't need any special tools (well besides a 27mm socket and wrench). Where radius arm brackets and radius arms can be installed in about 2 hours, this takes maybe double that.
 
As always these are engineered, designed, sourced, laser cut, formed, machined, welded, and powdercoated in the US!