SUBARU 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
S10071


EJ20
Type/Material/Application: Dual Spring - Special Alloy - Turbo - Drag Racing
Outside Diameter: 20.8 mm/28 mm
Inside Diameter: 15.88 mm/20.8 mm
Seat Pressure: 75 lbs @ 39.4 mm
Open Pressure: 200 lbs @ 29.4 mm
Rate Inch: 317 lbs
Coil Bind: 21.5 mm
Max Net Lift: 15 mm
This Spring requires Ferrea Titanium Retainer # E11043 and Ferrea Spring Seat Locator # SL1034 (Discard OEM Spring Seat Locator)

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$36.76
S10072


EJ20
Type/Material/Application: Dual Spring - Special Alloy Turbo - Endurance Spring
Outside Diameter: 20.8 mm/28 mm
Inside Diameter: 16.51 mm/20.8 mm
Seat Pressure: 70 lbs @ 39.4 mm
Open Pressure: 165 lbs @ 29.4 mm
Rate Inch: 241 lbs
Coil Bind: 20 mm
Max Net Lift: 15 mm
This Spring requires Ferrea Titanium Retainer # E11044 and Ferrea Spring Seat Locator # SL1034 (Discard OEM Spring Seat Locator)

ADD TO CART
$36.76
S10097


Type/Material/Application: Dual Spring - Special Alloy - Turbo - Drag Racing
Outside Diameter: 20.8 mm/28 mm
Inside Diameter: 15.88mm/20.8mm
Seat Press:. [email protected] mm
Open Press: 215 [email protected] mm
Rate Inch: 317lbs
Coil Bind: 21.5 mm
Max Lift: 14 mm
This Spring requires Ferrea Titanium Retainer # E11065 and Ferrea Spring Seat Locator # SL1051 (Discard OEM Spring Seat Locator)

ADD TO CART
$36.76
S10098


Type/Material/Application: Dual Spring - Special Alloy - Turbo - Endurance Racing
Outside Diameter: 20.8 mm/28 mm
Inside Diameter: 16.51 mm/20.8 mm
Seat Pressure: 80 lbs @ 36 mm
Open Pressure: 180 lbs @ 26 mm
Rate Inch: 254 lbs
Coil Bind: 21.0
Max Net Lift: 14 mm
This Spring requires Ferrea Titanium Retainer # E11065 and Ferrea Spring Seat Locator # SL1051 (Discard OEM Spring Seat Locator)

ADD TO CART
$36.76
S10155


2.0L - DOHC 16 Valve (FA20)
Type/Material/Application: Dual Spring - Turbo - Special Alloy
Outside Diameter: 28 mm/20.8 mm
Inside Diameter: 16.51 mm/20.8 mm
Seat Pressure: 70 lbs @ 24 mm
Open Pressure: 170 lbs @ 24 mm
Rate Inch: 254 lbs
Coil Bind: 18.6 lbs
Max Net Lift: 14.5 mm
This spring requires Ferrea Titanium Retainer # E11127 and Ferrea Spring Seat Locator # SL1140.(Discard OEM Spring Seat Locator)

ADD TO CART
$36.76

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