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Ferrea Valve Springs - Nissan 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.

Part #	Type	Inner OD	Outer Chrome Silicon	Seat Press	Open Press	Max Lift	Price/ Each	Buy Now
Nissan Sentra SE-R, 2.5L Spec V QR25  2002
S10083	Single Spring Turbo Special Alloy	25.19mm	n/a	80 lbs @ 34mm	150 lbs @ 24mm	12.5mm	$14.99
Valve Springs Require: 1) Ferrea Titanium Retainer #E11051 2) Factory Supplied OEM Spring Seat Locator
Nissan Sentra SE-R, 2.0L, DOHC, 16 Valve (SR20DE-SR20DET), 1991-'98
S10038	Dual Spring Turbo Special Alloy	22.75mm	29.5mm	80 lbs @ 34mm	180 lbs @ 24mm	13.5mm	$19.50
Valve Springs Require: 1) Ferrea Titanium Retainer #E11002 2) Ferrea Spring Seat Locator #SL1011 - Discard OEM Spring Seat Locator
Nissan 350 Z 3.5L V6 - DOHC 24v (VQ35) 2003
S10091	Single Spring Special Alloy Turbo Endurance App	25.19mm	n/a	75 lbs @ 34.8mm	145 lbs @ 24.8mm	12.5mm	$14.99
Valve Springs Require: 1) Ferrea Titanium Retainer #E11060 2) Factory Valves with recess tip AND Factory Supplied Spring Seat Locator
S10093	Single Spring Special Alloy Turbo Endurance App	25.19mm	n/a	85 lbs @ 34mm	155 lbs @ 24mm	12.5mm	$14.99
Valve Springs Require: 1) Ferrea Lightweight Valves without recess tip 2) Ferrea Titanium Retainer #E11058 2) Ferrea Spring Seat Locator #SL1048
S10103	Dual Spring Special Alloy Turbo Street/Drag	20.8	28.0	80 lbs @ 34mm	200 lbs @ 24mm	13mm	$19.50
Valve Springs Require: 1) Factory Valves with recess tip 2) Ferrea Titanium Retainer E11070 2) BOTH Ferrea Spring Seat Locator #SL1056 or #SL1057 and factory supplied Spring Seat Locator
Nissan 300 ZX 3.0L DOHC 24V (VG30D-Turbo VG30DTT), 1990-'96
S10039	Dual Spring	20.8mm	28.0mm	80 lbs @ 35mm	200 lbs @ 25mm	13mm	$19.50
Valve Springs Require: 1) Ferrea Titanium Retainer #E11017 2) And BOTH Ferrea Spring Seat Locator #SL1012 and Factory supplied Spring Seat Locator
Nissan Altima 2.4L, DOHC, 16 Valve (KA24DE), 1995-'99 Nissan 240 SX 2.4L, DOHC, 16 Valve (KA24DE), 1991-'98
S10043	Dual Spring - Turbo	22.75mm	29.5mm	80 lbs @ 34mm	180 lbs @ 24mm	13.5mm	$19.50
Valve Springs Require: 1) Ferrea Titanium Retainer #E11021 2) Factory supplied Spring Seat Locator
Nissan Skyline 6 cyl. In Line - 24v (RB 25) 2002
S10078	Dual Spring Turbo Special Alloy	20.8mm	28.0mm	95 lbs @ 30mm	195 lbs @ 20mm	12mm	$19.50
Valve Springs Require: 1) Ferrea Titanium Retainer #E11048 2) BOTH Ferrea Spring Seat Locator #SL1037 and Factory supplied Spring Seat Locator. Max retainer Step 2mm.
Nissan Skyline 6 cyl. In Line - 24v (RB 26) 1992-01
S10090	Dual Spring Turbo Special Alloy	20.8mm	28.0mm	110 lbs @ 39mm	210 lbs @ 29mm	12mm	$19.50
Valve Springs Require: 1) Ferrea Titanium Retainer #E11057 2) BOTH Ferrea Spring Seat Locator #SL1047 - Discard OEM Spring Seat Locator