2.4L - DOHC 16 Valve (A853) Type/Material/Application: Dual Spring - Turbo - Stage 1 - Special Alloy Outside Diameter: 20.8 mm/28.0 mm Inside Diameter: 16.51 mm/20.8 mm Seat Pressure: 90 lbs @ 37mm Open Pressure: 200 lbs @27 mm Rate Inch: 279 lbs Coil Bind: 23 mm Max Net Lift: 12 mm This Spring requires Ferrea Titanium Retainer #E11073 and BOTH, Ferrea Spring Seat Locator # SL1061 and Factory supplied Spring Seat Locator.
2.4L - DOHC 16 Valve (A853) Type/Material/Application: Dual Spring - Turbo - Stage 2 - Special Alloy Outside Diameter: 20.8 mm/28.0 mm Inside Diameter: 15.88 mm/20.8 mm Seat Pressure: 105 lbs @37 mm Open Pressure: 235 lbs @27 mm Rate Inch: 330 lbs Coil Bind: 23.5mm Max Net Lift: 12 mm This Spring requires Ferrea Titanium Retainer #E11074 and BOTH, Ferrea Spring Seat Locator # SL1062 and Factory supplied Spring Seat Locator.
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