Trans-Dapt Performance Products' valve cover spreader bars and tabs dont just complement their line of classsic musclecar, steel and aluminum valve cover fasteners, they are functrional, and help disperse loads across more of the valve cover flange to provide a more secure seal, and reduce the risk of oil seepage from the valve covers. SB Chevy and Pontiac sets includes 4 spreader bars or tabs, BB Chevy kits include 7, and SB Ford Windsor kits include 6. If your working on one of these V8 powerplant, you'll need two sets to complete the job.