SMALL BLOCK DUAL VALVE SPRINGS

Harmonics or high frequency fatigue is present in all racing engines and will usually destroy the valvetrain if not controlled. Properly designed valve springs will control the dominant harmonics, provide the needed stability, and reduce valvetrain component wear. Ferrea valve springs are developed from high strength alloys, including premium grade chrome silicon steel. Our springs are heat-treated and stress relieved, which dramatically increases the spring's life. Our valve springs provide the stability needed for high lift, high rpm racing engines, while minimizing the load loss for today's aggressive valvetrain combinations.
Item# Description Qty. Price
S10017


V8 Small Block
Type/Material/Application: Outer w/Damper/Chrome Silicon
Outside Diameter: 1.26
Inside Diameter: 0.86
Seat Press.: 115 lbs @1.700
Open Press: 268 lbs @1.210
Rate Inch: 310 lbs
Coil Bind: 1.160
Max Net Lift: .490"

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$20.08
S99100


Small Block - LS1
Type/Material/Application: Dual Spring. Pro PAC Alloy/Endurance Application
Outside Diameter: 0.925/1.275
Inside Diameter: 0.650/0.925
Seat Press.: 150 lbs @ 1.800
Open Press: 475 lbs @ 1.100
Rate Inch: 464 lbs
Coil Bind: 1.03"
Max Net Lift: .700"
This Spring requires Ferrea Titanium Retainer # E12000 and Ferrea Spring Seat Locator # SL1036

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$54.79
S99101


Small Block - LS1/LS7
(5/16 Conversion Kit)
Type/Material/Application: Dual Spring. Pro PAC Alloy/Endurance Application
Outside Diameter: 0.925/1.275
Inside Diameter: 0.650/0.925
Seat Press.: 150 lbs @ 1.800
Open Press: 475 lbs @ 1.100"
Rate Inch: 464 lbs
Coil Bind: 1.030"
Max Net Lift: .700
This Spring requires Ferrea Titanium Retainer #E12001 and Ferrea Spring Seat Locator #SL1036 AND Ferrea Valve Guide #VG1061 (For 5/16 stem diameter valves).

ADD TO CART
$54.79
S99102


Small Block - L92
Type/Material/Application: Dual Spring. Pro PAC Alloy/Endurance Application/Racing Application
Outside Diameter: 0.925/1.275
Inside Diameter: 0.650/0.925
Seat Press.: 150 lbs @ 1.750
Open Press: 425 lbs @1.150"
Rate Inch: 458 lbs
Coil Bind: 1.030"
Max Net Lift: .700"
This Spring requires Ferrea Titanium Retainer # E12002 and Ferrea Spring Seat Locator # SL1071 AND Ferrea Valve Guide (EXH #VG 1067) and (INT #VG1066)

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$54.79

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