Part# ET205 525" Lift ECOTEC Racing, Drop In, Single Valve Springs:  205# at Max lift (.530"), Drop In Racing Valve Springs, using stock retainers and without any Machining required. These springs are compatible with all Ecotec 2.0, 2.2. 2.4 liter Ecotec engines. Specs: Part Type: Ecotec Drop-In Racing Valve Springs. Compatible with all Ecotec 2.0, 2.2, 2.4 liter Ecotec engines Type: Single Damper Included: No Outer Spring Out Side Diameter (O.D.): 1.010**| Outer Spring In Side Diameter (I.D.): .740" Seat Pressure: 63 @ 1.320" Open Pressure: 205 @ 785* Spring Rate/Inch: 170 Maximum Suggested Lift: 530"* Coil Bind: , 785" Electro Polished: No Nitrided: No Suggested Steel Retainers: VSRET252-B.. Manufacturer: Racing Engine Technologies Manufacturer's Part Number: ET205 Packaged Weight: 3.0 lbs. Warranty: Race Application, No warranty expressed or implied

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