Manley Manley, valve spring kit. Std to .490″ lift

Description

ManleyManley, valve spring kit. Std to .490″ lift  513991

fits  57-85 XL Sportster (NU)

Incl. steel top collars and dual spring style valve springs. No machining required for installation. 20% more pressure than stock and suitable for stock to .490″ lift applications. Valve springs have an interference fit to reduce harmonics and control spring surge. Pressure: 85lbs@1.310″, 295lbs@.820″. Coil bind: .790″.

 

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