QA1 Greaseable Upper Ball Joint Upper - Screw-In - Low Friction - 2.95 in/ft Taper - 3.803 in Stud - 1/2-20 in Thread SS-WM1-M1-BTU These valve covers are a

These valve covers are a continuation of Holley's Vintage Series valve cover line featuring a classic finned design and retro styling cues

Transition area is die formed for reduction on topside only

Lightweight material allows for fresh air ventilation while blocking out the harsh sands of the desert or dunes

Plastic Core Silicone Rubber

QA1 Greaseable Upper Ball Joint Upper - Screw-In - Low Friction - 2.95 in/ft Taper - 3.803 in Stud - 1/2-20 in Thread SS-WM1-M1-BTU These valve covers are aFor a variety of racing applications, QA1's Screw In Style Ultimate Ball Joint is a great choice. This patented, self lubricating design is 100% owner rebuildable and is exclusive to QA1. Multiple stud lengths are also available, allowing for easy geometry changes. Infinite preload adjustment allows breakaway torque to be set as low as 0 ft. lbs. for a completely smooth, bind free operation. Precision tolerance ball to race conformity results in even