Billet LS Valve Covers Machined by QMPBillet LS Valve Covers Machined by QMP For LS engines using any rocker system including Jesel and T & D rocker systems. Includes 2 16AN female ports, one on each cover's front side. NOTE: Choose which option fits your build Option 1: with O ring Option 2: without O ring, for use with head surfaces that already O ringed Ships with bolts included. $20 shipping to anywhere in the USA.