Features

• Four-Link Frame Rails: Specially engineered profile clears suspension and axle components while accommodating low ride height and wide tires; Rugged 2" x 3" construction makes them strong without adding unnecessary weight
• 2" x 3" Crossmember: Mandrel bent for uniform profile; 3.5" drop center makes it adaptable to virtually any chassis design; 60" wide
• Diagonal Link: 3/4" OD DOM steel with 1/2" Spherical Rod Ends for easy, on-chassis adjustment
• Driveshaft Loop: 1-1/8" OD Mandrel Bent Round Tube contains driveshaft during U-joint failure
• Shock Crossmember: Tubular design provides high strength with light weight
• Upper & Lower Shock Mounts: Provides 6" of ride height adjustment
• Choice of 3-Way Adjustable Shocks or Coil-Over Shocks: Single, externally adjustable Coil-Over Shocks with CNC-machined billet aluminum body and 1" wide top/bottom bearings or economical 3-Way Adjustable Shocks with Spring Kit
• 4-Link Kit: 1" Diameter tubing increases strength; direct threaded links increases adjustability
• Springs: Matched to your specific rear vehicle weight. 2.5" x 12" long, premium chrome silicone steel powdercoated for durability

For race cars that are designed to deliver high horsepower and torque, it’s important that the vehicle have a frame that can handle that kind of power without excessive flex and torsion. A 4-link kit from Competition Engineering is a great way around this problem and will save a lot of time and headaches when it comes to fabrication and getting that vehicle track-ready. All kits are welded on jigs that are designed for consistency, accuracy and spec-correct fit. NOTE: 28” kits are available unwelded, giving you the flexibility to cut to your desired width for your application. 

Performance Benefits & Key Features

Designed for ultra high horsepower applications, these back half frame kits feature ¼” thick brackets with ⅝” mounting holes, on a 21” radius, and are set up with mounting holes for Wheel-E Bars. Link bars are 1 ¼” OD on the top and 1 ⅜” OD on the bottom, with your choice of 3-way or 12-way adjustable shocks and springs. Back half frame kits from Competition Engineering are designed to offer more adaptability and adjustability over a traditional ladder frame suspension, and all parts and materials are designed for strength while keeping weight down. That’s the kind of setup that can get you hooked up and down the track faster on race day!

Fitment, Compatibility & Applications

These 4-link frame rails are designed to accommodate wide tires and low ride height, with a specially engineered geometry that keeps suspension and axle components clear. 

The 2” x 3” crossmember is mandrel bent for uniformity and the 3.5” drop center makes it compatible with a wide range of chassis designs. This setup also is available with: 

• Mandrel bent 1 ⅛” driveshaft loop, designed to contain the driveshaft in case of U-joint failure
• Choice of 3-way adjustable shocks or coilover shocks, with CNC machined billet aluminum body and 1” bearings at top and bottom, or economical 3-way adjustable shocks with spring kit