12 340 Springs with dampers

Cam Style:Mechanical flat tappet

Basic Operating RPM Range:1,800-5,600

Intake Duration at 050 inch Lift:220

Exhaust Duration at 050 inch Lift:220

Duration at 050 inch Lift:220 int./220 exh.

Advertised Intake Duration:256

Advertised Exhaust Duration:256

Advertised Duration:256 int./256 exh.

Intake Valve Lift with Factory Rocker Arm Ratio:0.473 in.

Exhaust Valve Lift with Factory Rocker Arm Ratio:0.473 in.

Valve Lift with Factory Rocker Arm Ratio:0.473 int./0.473 exh.

Lobe Separation (degrees):110

Intake Valve Lash:0.022 in.

Exhaust Valve Lash:0.022 in