TALL BALL JOINTS FOR ULTIMATE PERFORMANCE. Proforged tall ball joints are built with a 0.50 longer ball stud to achieve an optimal negative camber curve dramatically improving your handling. Forged SAE4140 chromoly steel studs are enclosed in forged SAE1045 housings, heat treated for strength and durability, and every fit surface is CNC machined for precision fit and finish. Each unit is sealed with specially-designed CR-rubber boots for ultimate durability. 1,000,000 MILE WARRANTY. You can install our ball joints with confidence knowing that every part we sell is backed by our industry-leading 1,000,000 mile limited warranty. We can offer this because our parts are engineered, tested, re-tested, and subject to strict quality control procedures our quality is second to none. BUILT FOR PROFESSIONALS. There's a reason why the most well-respected performance suspension brands use Proforged ball joints we're fanatical about quality,