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Ferrea Valve Springs - GEO/GM/Suzuki For ALL racing environments! Developed from high strength alloys Springs are heat treated and stress relieved = increase in spring's life! Provide stability needed for high lift and high RPM. Minimizes load loss for today's aggressive valvetrain combo's. "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." IMPORTANT: All Valve Springs require Retainers and Spring Seat Locators. See requirements listed under Part #'s.

GEO Metro/SUZUKI Swift 1.0L SOHC 6V (G10)
Part #	Type	O.D.	I.D.	Seat Press	Open Press	Max Lift	Price/ Each	Buy Now
S10047	Dual Spring - Turbo Special Alloy	18.23mm 25.19mm	13.40mm 18.23mm	70 lbs @ 35.5mm	175 lbs @ 25.5mm	14mm	$20.99
Valve Springs Require: 1) Ferrea Titanium Retainer #E11024 2) Ferrea Spring Seat Locator #SL1018 - Discard OEM Spring Seat Locator

GM 2.2 Eco Tec
Part #	Type	O.D.	I.D.	Seat Press	Open Press	Max Lift	Price/ Each	Buy Now
S10057	Dual Spring - Turbo Special Alloy	20.8mm 28mm	16.51mm 20.8mm	75 lbs @ 32.5mm	175 lbs @ 22.5mm	14mm	$20.99
Valve Springs Require: 1) Ferrea Titanium Retainer #E11033 or Ferrea Aluminum Magnesium Retainer #E10026 2) Factory supplied spring seat locator For HIGH PRESSURE use BOTH Ferrea Spring Seat Locator #SL1028 and Factory supplied spring seat locator

GM 5 Cylinder - L5
Part #	Type	O.D.	I.D.	Seat Press	Open Press	Max Lift	Price/ Each	Buy Now
S10058	Dual Spring - Turbo Special Alloy	20.8mm 28mm	16.51mm 20.8mm	85 lbs @ 32mm	185 lbs @ 22mm	13.5mm	$20.99
Valve Springs Require: 1) Ferrea Titanium Retainer #E11034 or Ferrea Aluminum Magnesium Retainer #E10027 2) Both Ferrea Spring Seat Locator #SL1027 and Factory Supplied Spring Seat Locator