GREASABLE POLYURETHANE CONTROL ARM PIVOT SHAFTS. Proforged greasable polyurethane lower control arm pivot shafts are built using some of the toughest steel and polyurethane on the planet. Every fit surface is CNC machined for precision fit and finish. 1,000,000 MILE WARRANTY. You can install our control arm shafts 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 control arm shafts we're fanatical about quality, performance, and durability. Professionals save time and money with our competitively-priced products that outlast inferior brands. Do the job with confidence replace your worn components with the l