Valve cover rails use a press in steel bushing to protect the rail from over tightening and damage to the rail from taking the covers off and on the many many times during running a race motor.
Burn down pads are set up for industry standard 3.750" on center bolt pattern and have a 1.50" x .750" breather hole.
Covers are light weighting in at only six pounds a piece. These fit all AJ, Dart, Total Flow, KB, Chrysler, BAE, Veney and most other Hemi fuel cylinder heads.
Includes a set of eight snap rings to hold the spark plug tubes in the covers.