The PAC Racing PAC-1924-16 pairs a dual spring with an integrated damper to give Big Block Chevy hydraulic roller builds more valvetrain control than a single spring at a similar diameter, while staying within PAC's budget-friendly 1900 Series Hot Rod line. It suits engine rebuilds stepping up to a hydraulic roller cam with more lift or duration than the factory or a mild flat-tappet spring was designed to handle.

PAC Racing Springs PAC-1924-16 1900 Series Hot Rod Dual Valve Spring Set Features:

• Built for Big Block Chevy engines running a hydraulic roller camshaft
• Dual spring with damper, 1.540 in. outside diameter, 1.140 in. outer / 0.754 in. inner spring I.D
• 1.900 in. installed height with a 431 lb/in. spring rate, rated to 0.650 in. of valve lift
• 1.125 in. maximum coil bind height
• Alloy processed to aerospace shot-peening standards for superior fatigue performance in street performance and mild racing use