Appears on Diagrams (6)

• Empire BT 4 - Combat, Delta, ERC, Assault, Iron Horse, SWAT, Banshee Diagram — #57 “Internal Valve Spring”
• Empire BT 4 Slice Diagram — #10 “Internal Valve Spring”
• Empire BT Delta Diagram — #47 “Internal Valve Spring”
• Empire BT Delta Elite Diagram — #30 “Internal Valve Spring”
• Empire BT Omega Diagram — “Internal Valve Spring”
• Empire BT Omega Diagram 2012 — #11 “Internal Valve Spring”