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Ferrea Valve Springs - Ford/Focus 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." (Ferrea catalog, '03) IMPORTANT: All Valve Springs require Retainers and Spring Seat Locators. See requirements listed under Part #'s.

Part #	Type	Inner OD	Outer Chrome Silicon	Seat Press	Open Press	Max Lift	Price/ Each	Buy Now
Ford 2.3L, DOHC ZETEC, 16 Valve, 2024
S10040	Single Spring Special Alloy	25.19mm	n/a	60 lbs @ 31.5mm	140 lbs @ 21.5mm	12.5mm	$13.99
Valve Springs Require: 1) Ferrea Titanium Retainer #E11018 2) And BOTH Ferrea Spring Seat Locator #SL1020 and Factory Supplied Spring Seat Locator.
S10041	Dual Spring Turbo Special Alloy	18.23mm	25.19mm	75 lbs @ 32.75mm	195 lbs @ 22.75mm	13.5mm	$20.99
Valve Springs Require: 1) Ferrea Titanium Retainer #E11018 2) Ferrea Spring Seat Locator #SL1019 - Discard OEM Spring Seat Locator Note: This spring (S10041), can only be used with Ferrea Aluminum Bronze Valve Guides (for 5.5mm valve stem) #VG1015 Intake ($3.25) and #VG1016 Exhaust ($3.25) and Ferrea Valve Seals #VS1000 Exhaust ($1.45) and VS1001 Intake ($1.35).  Call to order these parts. (603) 378-0090.
Ford Escort 2.0L, DOHC ZETEC, 16 Valve (ZX2), 1999-2001 Ford Focus 2.0L, DOHC ZETEC, 16 Valve (ZX3), 2024-'2001
S10040	Single Spring Special Alloy	25.19mm	n/a	60 lbs @ 31.5mm	140 lbs @ 21.5mm	12.5mm	$13.99
Valve Springs Require: 1) Ferrea Titanium Retainer #E11018 2) And BOTH Ferrea Spring Seat Locator #SL1020 and Factory Supplied Spring Seat Locator.
S10041	Dual Spring Turbo Special Alloy	18.23mm	25.19mm	75 lbs @ 32.75mm	195 lbs @ 22.75mm	13.5mm	$20.99
Valve Springs Require: 1) Ferrea Titanium Retainer #E11018 2) Ferrea Spring Seat Locator #SL1015 - Discard OEM Spring Seat Locator Note: This spring (S10041), can only be used with Ferrea Manganese Bronze Valve Guides (for 5.5mm valve stem) #VG1006 Intake ($3.25) and #VG1007 Exhaust ($3.25) and Ferrea Valve Seals #VS1000 Exhaust ($1.45) and VS1001 Intake ($1.35). Call to order these parts. (603) 378-0090.