Crower Dual Valve Springs Tungsalloy, OD Outer 1.440", Rate/inch 324 lbs C68100X200-16 Product:121 lbs @ 1.750", 309 lbs @ 1.200", Coil Bind @ 1.030", suit C87062 r 4 port Boost control soldenoids

4 port Boost control soldenoids are commonly used for big boost applications

5mm (1-1/8”) and has wide rollers for even tracking of cutter wheel

Comes complete with gaskets

Part Number: AF118-12BLK

The Aeroflow Performance small block Chevy cylinder heads are designed for entry level street performance engines to give the ultimate in flow at a budget price

Crower Dual Valve Springs Tungsalloy, OD Outer 1.440", Rate/inch 324 lbs C68100X200-16 Product:121 lbs @ 1.750", 309 lbs @ 1.200", Coil Bind @ 1.030", suit C87062 r 4 port Boost control soldenoidsDual Valve Springs Tungsalloy, OD Outer 1. 440", Rate inch 324 lbs121 lbs @ 1. 750", 309 lbs @ 1. 200", Coil Bind @ 1. 030", suit C87062 retainers C68100X200 16 8100X200 16 Spring O. D: 1. 440" Spring I. D: . 811" Seat Load: 107 @ 1. 800" Open Load: 255 @ 1. 300" Coil Bind: 1. 030" Rate (LBS In): 324 lbs Max Lift: . 770"