Part numbers are:
Cam and lifter kit:CL20-227-4
Valve springs: 995-16
Retainers: 740-16
All of these parts are matched as a kit. These are the correct springs and retainers for the cam and lifter kit.
Cam Style:Hydraulic flat tappet
Basic Operating RPM Range:2,000-6,000
Intake Duration at 050 inch Lift:231
Exhaust Duration at 050 inch Lift:237
Duration at 050 inch Lift:231 int./237 exh.
Advertised Intake Duration:275
Advertised Exhaust Duration:287
Advertised Duration:275 int./287 exh.
Intake Valve Lift with Factory Rocker Arm Ratio:0.525 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio:0.525 in.
Valve Lift with Factory Rocker Arm Ratio:0.525 int./0.525 exh.
Lobe Separation (degrees):110
Grind Number:CRS XE275HL-10
Computer-Controlled Compatible:No
Lifters Included:Yes
Lifter Style:Hydraulic flat tappet
Valve Springs Included:No
Retainers Included:No
Locks Included:No
Valve Stem Seals Included:No
Timing Chain and Gears Included:No
Assembly Lubricant Included:Yes
Pushrods Included:No
Rocker Arms Included:No
Gaskets Included:No
Valve Springs Required:Yes
Quantity:Sold as a kit.
Number of Springs Per Valve Dual
Outside Diameter of Outer Spring (in):1.437 in.
Coil Bind Height (in):1.020 in.
Damper Spring Included:Yes
Spring Rate (lbs/in):402 lbs./in.
Inside Diameter of Outer Spring (in):1.073 in.
Inside Diameter of Inner Spring (in):0.697 in.
Valve Spring Style:Standard
Coated:No
Quantity:Sold as a set of 16.
Outside Diameter of Outer Spring (in):1.500 in.
Retainer Material:Steel
Lock Style:10 degree
Valve Spring Style:Standard
Retainer Style:Standard
Number of Springs Per Valve Dual
Outside Diameter of Middle Spring (in):1.060 in.
Inside Diameter of Inner Spring (in):0.690 in.
Locks Included:No
Quantity:Sold as a set of 16.
Notes:Will work with single or dual springs.