Stocker Star double adjustable smooth body shock. For use with 04-06 GTOs. QA1 offers stock mount aluminum adjustable shocks for 04-06 Pontiac GTO. Double, single and non-adjustable valving allows for your choice of ride quality. With its smooth look, high performance handling and unbeatable price, you can't go wrong with a QA1 smooth body shocks. These lightweight billet aluminum smooth body shocks are made in the USA and offer easy, bolt-in installation. They are 100% dyno tested and serialized and serviceable and rebuildable by QA1 authorized service centers.