Home » S&S Cycle 631 Lift Chain Drive Cam Harley Evolution EVO Big Twin Engines 84-99
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S&S Cycle 631 Lift Chain Drive Cam Harley Evolution EVO Big Twin Engines 84-99

Out of stock
SKU: SS33-5080
$253.16
-16% $299.95 $253.16

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IN BRAND NEW CONDITION

PART # 33-5080

DRAG PART # DS199229

Fits: 1984-1999 Harley-Davidson Evolution Big Twin Models

  • S&S Cams are tested on the dyno, street and track before being offered to the public
  • With hundreds of hours of testing on each cam, you know you are getting the best cam S&S can produce
  • Made in the U.S.A.

631 CAM

  • Makes best power from 4500 rpm and up
  • Requires high-lift springs
  • For all high-compression engines 11:1 and up compression
  • Works with solid or hydraulic tappets
 Grind  Open  Close  @ .053  Valve Lift

631 Evo Cam
 Intake  34°  61°  275°  .630
 Exhaust  66°  29°  276°  .630

1984-1999 Harley-Davidson Evolution Big Twin Models

Product Title Store SKU MFR Part #
S&S Cycle 631 Lift Chain Drive Cam Harley Evolution EVO Big Twin Engines 84-99 SS33-5080 33-5080