Eliminates flex, control wheel hop and body roll with these heavy-duty lower rear control arms. The weight jacker model features adjustable spring cups and HAL QA-1 Heim joints. This allows the driver to lower the rear end of the car by a full 1-inch and still use stock springs or raise back of car by as much as 2-inches from stock ride height. This is an excellent feature for lowered cars that need to be raised for tire clearance, like slicks. Also great for road racecars requiring adjustability at each corner of vehicle. Each set includes a pair of precision welded lower control arms, all necessary hardware and a durable powder coated finish. Installation takes 1-hour for the fixed model and 3-4 hours for the weight jacker model using basic hand tools. Features Include: Replaces weak factory lower control arms Adjustable spring cups allow for adjusting ride height HAL QA-1 heim joints Improves traction by eliminates flex and controlling wheel hop Powdered coated finish Precision welded Includes necessary hardware Installs in approx. 3-4 hours For more information and proof of a retail price over $500 please visit Granatelli Motorsports @ http://www.granatellimotorsports.com/fordrearlowercontrolarms.htm