4-Link Rear Suspension Kits & Components

A 4 link rear suspension kit allows for better traction than a leaf spring setup as more tuning and adjustment can be made with the link placement, coil spring rating, and coil-over shock adjustment. This provides better grip, improved traction, and increased handling performance for your vehicle.

Having a custom 4-link suspension setup allows the ability to adjust your rear suspension for better ride quality, traction, and handling. This is done by relocating the links to different mounting points on the brackets as well as adjusting the length of the bars by tightening or loosening the heim joints / rod ends.

A 4 link rear suspension uses four links that help to keep the rear axle from moving side-to-side and front-to-back, while allowing it to move up and down. Two bars are attached to frame brackets on each side and the other ends of the bars are attached to axle housing brackets parallel to the frame and in front of the rear axle. Heim joints (rod ends) on the end of each bar allow the rear axle to travel up and down as the bars rotate on their attachment points with bolts. In a "parallel 4-link", a panhard bar attaches between the axle and the frame on one side to help keep the axle from moving from side-to-side. In a "triangulated 4-link", a panhard bar is not required as the 4 link bars are connected on each side of the center of the axle housing and angle out to the frame rails. In both designs, a coil-over shock and spring setup supports the body and controls vertical suspension travel. A 4 link suspension diagram can be helpful in showing you how it works. JEGS offers a 4 link rear suspension kit Ford, Chevy, Mopar, and custom applications.

A 4 link rear suspension install requires careful research and planning. The first step in building a four link rear suspension is determining the vehicle ride height. This is the height the vehicle would be under its own weight, including the driver, on the street. The measurement should be taken from a fixed point on the body such as the rocker box weld seams. Next, you need to determine your rear axle centerline. Then the rear axle can be removed and any other rear suspension components. Also, remove the axles, center section and bearings to guard against distortion during welding. Then remove all brackets that will not be reused. Next, determine the drivetrain offset. Then mock the rear axle into place using the centerline and drivetrain offset measurements (make sure the pinion is on the centerline and the axle tubes are perpendicular to the centerline) and then tack weld the 4 link rear suspension brackets. Assemble the rod ends into the tubes on the links. Make sure all 4 link bars are the same length to eliminate bind. Next add a panhard bar or diagonal link to prevent side-to-side movement. Confirm the correct pinion angle at this time. Once everything is confirmed correct and lined up, the brackets can be fully welded to the frame and axle housing as well as confirming all connections are properly tightened. Finally, test drive the vehicle at slower speeds to ensure there are not any handling issues.

A JEGS expert is ready to answer your questions and help you find the 4 link rear suspension kits and 4 link parts that you require for your street rod, muscle car, or drag race application.