QA1 Greasable Ball Joint Upper Bolt-In 2.040 in/ft Taper - 4.350" Stud Frame Height Gauge Increased spark energy at the

Increased spark energy at the spark plug

Regulator Fitting (-6 AN for Pro-Flo 2 and Pro-Flo XT systems)

Rubber Coated Fiber

2003-2008 Chevrolet Express 1500

QA1 Greasable Ball Joint Upper Bolt-In 2.040 in/ft Taper - 4.350" Stud Frame Height Gauge Increased spark energy at theQA1's 4 Bolt Style Ultimate Ball Joint is ideal for a variety of racing applications. Exclusive to QA1, this patented, self lubricating design is 100% owner rebuildable. 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 load distribution