Universal Drag Race H.D. Parallel 4-Link Rear Suspension Kit, Adjustable, Heavy Duty, High Horsepower, Stainless Steel, Complete with Mounting Hardware

Parallel 4-link suspension system works with full frame or unibody vehicles. Locates axle and prevents rotation/pinion angle change. Requires a Panhard bar or Watts link system for total axle control. Weld on 7 gauge brackets place tubular links in double shear mounting for strength. Large 3/4-inch rod ends, and 1-inch steel link tubes easily handle high horsepower. Multiple link points to square the rear axle, change instant center, and more. Includes weld on upper shock mounts and adjustable bolt on lower mounts. Works with coil spring or air spring mount kits or coilover shocks. Can be installed inboard or outboard of frame rail as needed for clearance. Give Your Racecar a True Adjustable 4-Link Rear Suspension for Better Control A “fixed” suspension with no adjustment is fine for street use and low horsepower applications. In most cases what the factory engineer designed for suspension pivot points, spring rates, pinion angle, and more are all a series of compromises in packaging and cost by the manufacturer. Trying to put 500 or more horsepower down on a dragstrip surface with drag radials or slicks is asking for major wheel hop or broken parts as leaf springs wrap up, triangulated four-links bind, and more. All these factory compromises do nothing for maintaining pinion angle and eliminating axle movement. Bolt on traction aids like traction bars help limit pinion angle changes but do nothing to change roll center or anti-squat. The only way to adjust these settings is with an adjustable rear suspension and one of the most popular options is a parallel four-link suspension setup. The parallel four-link suspension is just as it sounds, four links (two upper and two lower) that are parallel to each other connecting the axle housing to the vehicle’s frame or unibody. The parallel 4-link suspension locates the rear axle assembly, centering it in the rear wheel opening, and prevents pinion axle changes during hard acceleration. Furthermore, the four-link suspension design allows squaring the axle in the chassis so that there is no deviation on the rear thrust angle, provides the user with the ability to adjust the instant center in relation to the car’s center of gravity (hint, a lot of math is involved). Making these changes also provides for changes in anti-squat, which further aids in tuning the 4-link rear suspension and chassis to the horsepower level, traction ability of the track surface and your rear tires, and more for the best launch possible. Our Parallel Four-Link Suspension Works in Most Any Chassis Style No matter if you’re looking to race a full frame pickup or a unibody muscle car like a Camaro or Mustang, our universal 4-link kit can be fitted to your ride. The frame brackets are made from 7 gauge steel for strength and are designed to be welded to any structural part of the frame or unibody (some vehicles may require additional reinforcement or a crossmember added for the correct placement of the frame brackets). The axle brackets feature a 3-inch radius to fit common 3-inch axle tubes, such as those found on the venerable Ford 9-inch axle housing. Both provide double shear mounting of the adjustable suspension links for strength. Adjustable rear shock mounts allow you to position the lower shock mount for the correct shock distance per your shock manufacturer. The 1-inch steel link bars use heavy duty 3/4-inch rod ends with left and right threads, allowing easy on vehicle adjustments for pinion angle and axle centering. We provide plenty of link mounting hole options to plot and set your suspension’s instant center and anti-squat for your horsepower level, track conditions, and more. The parallel 4-link rear suspension ultimately controls axle location fore/aft and pinion angle, but you will need either a Panhard bar or Watts link to control lateral axle movement