Set of 16 Performance Springs (equivalent to Comp 972-16) and Retainers for 289 302 351W Ford Small Blocks with Flat Tappet Cams up to .550" lift 

02-1021-16 SPRING SPECIFICATIONS

  • Outside Diameter: 1.464 in.
  • Inside Diameter: 1.064 in.
  • Seat Load: 129-lbs. at 1.800 in.
  • Open Load: 305-lbs. at 1.250 in.
  • Coil Bind: 1.135 in.
  • Spring Type: Single with damper
  • Note: Cylinder head machining may be required

03-1003-16 RETAINER SPECIFICATIONS

  • Outside Diameter: 1.440 in.
  • Step 1 Diameter: 1.050 in.
  • Step 2 Diameter: .700 in.
  • Stem Diameter: 11/32 in.
  • Lock Style 7 degree
  • Material: Chromemoly

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