Eibach Drag-Launch Springs Eibach Drag-Launch Springs are engineered to do one thing: provide maximum traction to the drive wheels, front or rear, import or domestic. Success in drag racing requires hard, consistent launches at the starting line. Proper management of weight transfer is vital for success in the quarter-mile—and these springs provide it. Order the Eibach Drag-Launch kit designed to fit your application for that split-second advantage! Product features: * Turns horsepower into hook-up * Adjustable to your horsepower and tire package * Made of the same high-quality materials as Eibach’s Pro-Kit and motorsport springs * Precision-engineered to improve weight transfer and control axle torque for lower 1/4-mile times Spring Positioning: Front and Rear Spring Type: Coil For Street Use: No Bushings Included: No Progressive Rate Spring: No Spring Finish: Gray/Silver Quantity: Sold as a set of 4. Notes: Does not lower vehicle.