QA1 99-06 Chevrolet Silverado 1500 2WD 1-1/2in Front Sway BarProduct Overview Give your NBS truck a more stable, confident feel on the road with QA1s 1. 5" front sway bar kit. Designed specifically for 2WD 19992006 Silverado and Sierra models, this upgrade reduces body roll and sharpens handling. LESS BODY ROLL, MORE CONTROL This heavy duty sway bar helps keep your truck flatter in turns and more composed in everyday driving. Its larger 1. 5" diameter delivers increased stiffness and front end stability,