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 Manley NexTek Roller Valve Springs Specially processed premium-grade materials. State of the art winding and thermal treatment. Virtually free of impurities or surface irregularities. Better valvetrain stability and component life. Set of 16. 
Part Type: Roller Valve Springs Style: Nextek  Type: Dual  Damper Included: No Outer Spring Outside Diameter (O.D.): 1.640" Outer Spring Inside Diameter (I.D.): .860" Inner Spring Outside Diameter (O.D.): NA Inner Spring Inside Diameter (I.D.): NA Seat Pressure: 250 @ 2.000" Open Pressure: 800 @ 1.150" Valve Spring Rate: 647 Maximum Suggested Lift: .880" Coil Bind: 1.070" Electro Polished: No Nitrided: No Suggested Steel Retainers: NA Suggested Titanium Retainers: 3503 Suggested Seat Cups: NA Suggested Locators: NA Manufacturer: Manley  Manufacturer's Part Number: 221424-16 Packaged Weight: 5.9 lbs. Warranty: Race Application, No warranty expressed or implied Quantity: Sold in Sets of 16  |