2.0L - DOHC 16 Valve (SR20DE - SR20DET) Type/Material/Application: Dual Spring - Turbo - PAC enhanced Alloy Outside Diameter: 23.10 mm/30 mm Inside Diameter: 17.2 mm/23.10 mm Seat Pressure: 80 lbs @ 34 mm Open Pressure: 195 lbs @ 24 mm Rate Inch: 254 lbs Coil Bind: 22 mm Max Net Lift: 12.5 mm This Spring requires Ferrea Titanium Retainer # E11002 and Ferrea Spring Seat Locator # SL1011 (Discard OEM Spring Seat Locator)
3.0L - DOHC 24 Valve (VG30D - Turbo VG30DTT) Type/Material/Application: Dual Spring - Chrome Silicon Outside Diameter: 20.8/28.0 Inside Diameter: 15.3 mm/20.18 mm Seat Pressure: 80 lbs @ 35 mm Open Pressure: 200 lbs @ 25 mm Rate Inch: 305 lbs Coil Bind: 22 mm Max Net Lift: 13 mm This Spring requires Ferrea Titanium Retainer # E11017 and BOTH Ferrea Spring Seat Locator # SL1012 and Factory supplied Spring Seat Locator
2.4L - DOHC 16 Valve (KA24DE) Type/Material/Application: Dual Spring - Turbo - PAC enhanced Alloy Outside Diameter: 23.10 mm/30 mm Inside Diameter: 17.2 mm/23.10 mm Seat Pressure: 80 lbs @ 36 mm Open Pressure: 195 lbs @ 26 mm Rate Inch: 254 lbs Coil Bind: 22 mm Max Net Lift: 12.5 mm This Spring requires Ferrea Titanium Retainer # E11021 and BOTH Ferrea Spring Seat Locator #SL1064 and Factory supplied Spring Seat Locator
6 Cyl. In-Line - 24 Valve (NEO) Dual Spring - Turbo/Special Alloy Outside Diameter: 20.8 mm/28.0 mm Inside Diameter: 16.51 mm/20.8 mm Seat Pressure: 95 lbs @ 30 mm Open Pressure: 195 lbs @ 20 mm Rate Inch: 254 lbs Coil Bind: 17.5 mm Max Net Lift: 12 mm This Spring requires Ferrea Titanium Retainer # E11048 and BOTH, Ferrea Spring Seat Locator # SL1037 (INT) and #SL1150 (EXH) AND Factory supplied Spring Seat Locator. Maximum Retainer Step 2 mm
6 Cyl. In-Line - 24 Valve - (RB26) Type/Material/Application: Dual Spring - Turbo - Special Alloy Outside Diameter: 20.8 mm/28.0 mm Inside Diameter: 16.51 mm/20.8 mm Seat Pressure: 110 lbs @ 39 mm Open Pressure: 210 lbs @ 29 mm Rate Inch: 254 lbs Coil Bind: 26.5 mm Max Net Lift: 12 mm This Spring requires Ferrea Titanium Retainer # E11057 and Ferrea Spring Seat Locator # SL1047 (Discard OEM Spring Seat Locator)
3.5L - V6 - DOHC 24 Valve (VQ35) Type/Material/Application: Outside Diameter: 20.8 mm/28.0 mm Inside Diameter: 15.88 mm/20.8 mm Seat Pressure: 80 lbs @ 34 mm Open Pressure: 200 lbs @ 24 mm Rate Inch: 305 lbs Coil Bind: 19 mm Max Net Lift: 13 mm This Spring to be used with Ferrea lightweight Valves without recess tip. This spring requires Ferrea Titanium Retainer #E11079 and Ferrea Spring Seat Locator #SL1065. (Discard OEM Spring Seat Locator).
6 Cyl. In-Line - 24 Valve - (RB25DET) This Spring requires Ferrea Titanium Retainer # E11082 and Ferrea Spring Seat Locator #SL 1068 (EXH Side) and Ferrea Spring Seat Locator #SL1069 (INT Side). (Discard OEM Spring Seat Locator) WARNING: DUE TO VALVETRAIN
4.5L 6 Cyl. In-Line - 12 Valve - (TB45E) Type/Material/Application: Dual Spring - Chrome Silicon - Endurance Outside Diameter: 23.1 mm/31 mm Inside Diameter: 17.35 mm/23.1 mm Seat Pressure: 70 lbs @ 40.6 mm Open Pressure: 195 lbs@ 30.6 mm Rate Inch: 317 lbs Coil Bind: 20.5 mm Max Net Lift: 14.15 mm This Spring requires Ferrea Titanium Retainer # E11102 and Ferrea Spring Seat Locator # SL1111 (Discard OEM Factory supplied Spring Seat Locator.)
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