Constructed using Tig-welded chrome-moly tubing Includes: 2 Upper Control Arms, 2 Lower Control Arms, Ball Joints, Delrin Bushings in the Lowers, Travel Limiter Bolts, and Chrome-Moly Rod-Ends on the Uppers. Built-in 7 Degrees of Positive Caster Designed to Replace Stock Control Arms with No Frame Modifications Reduces Weight by up to 15 lbs Per Side Uses a Stock Spring/Shock OR a Bolt-in Style Coil-Over System that utilizes a GM T-bar Lower Shock Mount Uppers Come with Limiters in Place to Control Front Suspension Travel (Travel Limiter Bolts) Designed for Drag Race Applications Where Spindle Caster Can Range from 0 to 10 Degrees (Not for Street Use) NOTE: These Lower Arms are Designed for Drag Springs – Use of OE/Stock/Existing Spring May Result in a 1″ – 1.5″ Lower Ride Height Please specify if you’re using AFCO / Menscer bolt-in shocks (custom lower control arm is needed for those setups)