Four link suspension uses four triangulated links from the frame of the vehicle to the solid axle to control the axle under the vehicle. It allows for maximum articulation of the solid axle under the vehicle.If you have the answer to the following question(s) please email them to: info@aftermarketbuildersguide.com – What are the lengths of the factory links? What size bolts do the factory links use? Are there any common issues with these links?