LS3/LS99 Mongoose CNC Cyl. Heads 260cc Assm 1971-mercury-montego-esi6503916 Coil Spring - DRS -

Coil Spring - DRS - Conventional - 5 in OD - 18 in Length - 165 lb/in Spring Rate - Front - Steel - Gray Powder Coat - Each

Easy Installation Using Only Basic ToolsFits later model BBK Fuel Pressure Regulators Part #1706 and Part #1707 ONLY

25 in H x 3 in D - Dual Pass - Passenger Side Inlet - Passenger Side Outlet - Aluminum - Polished - GM LS-Series - GM Fullsize Truck 1973-87 - Each

5 in ID - Aluminum - Clear Anodized - Set of 50

Bolt - 1/2-20 in Thread - 3 in Long - 9/16 in 12 Point Head - Chromoly - Black Oxide - Universal - Set of 5

LS3/LS99 Mongoose CNC Cyl. Heads 260cc Assm 1971-mercury-montego-esi6503916 Coil Spring - DRS -Cylinder Head LS3 Mongoose Assembled 2. 165 1. 600 in Valves 260 cc Intake 69 cc Chamber 1. 270 in Springs Angle Plug Aluminum GM LS Series Pair